Lynda.com has an excellent collection of training videos for learning programming, design, bitcoin fundamentals, bookkeeping, and much more. Lynda charges a monthly fee, but if you have a library card, the chances are you can become a Lynda member for free. Here’s a link for L.A. residents to use Lynda (and other great stuff, like the digital edition of the New York Times) for free. — MF

A great one-episode podcast that taught me a lot about negotiation that I wished I had learned decades ago: “How Creatives Should Negotiate”, run by Ramit Sethi on the Tim Ferriss podcast. As the title suggests this 1.5-hour seminar is aimed at creatives such as photographers, musicians, designers, and the like, but really the advice is useful to anyone. — KK

Two Slate journalists attended a class on negotiation skills at Columbia Business School and created a 10-episode podcast called Negotiation Academy. After listening to the series, I feel like I can negotiate a better deal for myself from now on. — MF

A reminder of the progress we all enjoy. A curious fellow decides to spend six months growing his own wheat and vegetables, making his own cheese and meat, evaporating his own salt in order to make his own sandwich from scratch. He spent $1500 on this lunch, and in this short, How To Make A $1500 Sandwich, he gives the particulars of what is really involved in our everyday consumption. Like the Toaster Project, which was an earlier attempt by an artist who spent a year to make a $30 electric toaster from scratch (iron ore, petroleum plastic), it conveys in concrete terms the huge subsidy we get from modern civilization. I repeatedly return to these brilliant examples. — KK

Anki is a free flashcard program that uses the Spaced Repetition System (SRS) to present words or facts you have trouble remembering more frequently than ones you can recall easily. I’m using Anki based on the advice in the book Fluent Forever: How to Learn Any Language Fast and Never Forget It, which I highly recommend. — MF

Tiny Cards is a free smartphone app that lets you make spaced repetition flashcards to help you learn languages, history facts, the elements, constellations, or anything else. I’m using it to help me with my Japanese vocabulary. — MF

The website The Kid Should See This gathers the best short videos that explain how the world works. Subjects includes nature, science, technology, art, and politics. So far they have collected 2,600 videos that “are not made for kids, but are perfect for them.” The videos are really great for any do-it-yourselfer, and for any life-long learner. In fact, the site might be called “The Adults Should See This.” — KK

The Learning Toolbox website has a bunch of useful tips for getting the most out of studying. It was created for students with “mild disabilities,” but I think it’s useful for all students and non-students too. As someone who gets distracted easily, I appreciated the tips on how to focus on lectures and while reading. — MF

For high-schoolers: The Khan Academy, the premier free online classroom, will tailor an SAT study course to your personal abilities based on your PSAT scores. They claim to be able to increase scores by 115 points. Sign up at Khan Academy, give PSAT permission to share your completed test, and Khan will create a free course designed for you personally. It will focus on your weak areas. BTW, they found that students who study together learn 2.5x as much as those who study alone. — KK

I’m always amazed and slightly annoyed when the hotel hair dryer works better than my more expensive one back home. This hair dryer is inexpensive, portable and works just as good as any $50+ dryer. — CD

Because of the Tangle Teezer, I actually like brushing my hair after I shower. Just a few, quick strokes and my hair is super smooth and detangled. I’ve used the Tangle Teezer on my 10-year-old niece, who has really long hair and hates getting it brushed, and there was not one complaint. A tip for brushing long hair painlessly: gather all hair in a fist and brush in sections from the bottom up. — CD

Over the years I’ve spent anywhere from $20 to $150 on heat styling tools, and this $25 Remington Curling Wand is the best hair curler I’ve ever owned. It heats up in 30 seconds and the curls keep all day, even through the next day. I owned the smaller ½-inch wand for 5 years before I bought the larger 1-inch wand and now I can curl all my hair in less than 5 minutes. — CD

I use my satin pillowcase ($10) on nights before “no-wash” hair days. The silky pillowcase prevents my hair from getting tangled up or matted so that I barely have to brush it or style it. Beauty blogs claim that these pillowcases also prevent face wrinkles while you’re sleeping, which would be an added bonus if true! I just like how it makes my hair look and how cool and soft it feels. — CD

My favorite quick-fix hair product is Bumble and Bumble Brilliantine. The product description says it’s unique and hard to define, and it’s true. I use it when I don’t have enough time to heat style my hair. I rub a dime-size amount between my palms and pat it through out my hair to smooth it out, create shine and get rid of flyaways. — CD

If I don’t spike my hair, I look like Captain Kangaroo or Moe Howard. Bangs may have worked for those two august gents, but it doesn’t for me. The best styling gel I’ve come across is Got2b Ultra Glued Invincible Styling Gel ($8 for a 2-pack as an Amazon Prime Add-on Item). A little dab does the trick, and it lasts all day. — MF

These spin pins are essential for holding your hair in place in a perfect little bun. They never loosen or fall out, even while working out. My only problem is that I’m always losing them and rebuying them. — CD

I bought an Aquis Microfiber hair towel and I use it every day. It’s probably shaved off a minute or two of blowdrying, but what I really appreciate is that my hair is breaking less, and visibly smoother and less frizzy. Also, it’s much more comfortable to wear a lighter, less heavy towel on my head. — CD

Some days I skip out on washing my hair. After my reserve of complimentary hotel shower caps ran out, I needed to buy my own. These are cheap and long-lasting, but the prints are what sold me — nostalgic and fun. Reminds me of my grandmother in Mexico. — CD

Dry shampoo works great at absorbing oil and making my hair look clean when I skip out on washing it. All brands pretty much work the same, and you could even use talcum powder. I prefer Batiste Dry Shampoo because it comes in “brunette”, which spares me having to aggressively comb out the white powder from other shampoos. — CD

I often get sinus headaches and sometimes when I fall asleep with a headache, I will wake up with deep wrinkles from brow furrowing throughout the night. Frownies helps to prevent these from forming. I’ve already gone through a box and will continue reordering. — CD