The United States has a strange (legal) tax loophole where you can double-count capital gains when donating securities (with some restrictions): If you buy a stock, the value goes up, and you've held it for at least a year, you can donate it and claim a tax deduction on the …
Clip keys together with tiny carabiners
I've always found it annoying to have a bunch of keys in my pocket (they're heavy, sometimes poke into you, and create weird bulges), so I try to carry as few as possible. Unfortunately, I've reached a point where I have a fairly large number of keys that I need …

The case for aftermarket blind spot mirrors
Car side and rear-view mirrors are designed to give you a view around your car, but they typically don't show you the two spots directly to the side of your car (the "blind spots"). Luckily, you can increase the field of view of your side mirrors by over 200% and virtually eliminate blindspots by adding aftermarket blind spot mirrors.

If you're not a morning person, consider quitting allergy pills
This is probably obvious to a lot of people, but I thought it still might be useful since I didn't think of it myself for years. Since sometime in college, I've been the kind of person who wakes up groggily at 10 am and then drags myself out of bed …
Write code to interact with 3rd parties using their data model
When writing code to interact with a third party like a SaaS provider, you typically need to write both code to handle the API the third party uses, and translate their data model into your data model. One thing I've found that makes this easier is to do each step …