I work from home now, but when I still commuted (BART train in the bay area), the best purchase was a ultra thin laptop-sleeve-style backpack. On top of being s

I work from home now, but when I still commuted (BART train in the bay area), the best purchase was a ultra thin laptop-sleeve-style backpack. On top of being super lightweight, I can sit with it on my back, or I can stand (and not be one of the jerks who don't put down their huge backpack on the floor when it's crowded and they're standing). If it's raining, it fits underneath my jacket. In a similar vein, lightweight everything is really important to me as quality of life, as a skinny lightweight Asian person who has a lot lower strength than the average American. After going through many different brands of sneakers as I grew up (all your usual brands like Nike, Adidas, Reebok, Converse, etc.), I've settled on Big5's Denali (low-cut) hiking shoes. It's both cheap in price and cheaply built, so it does worn out every couple of years and I have to get new ones; but it's the most lightweight and comfortable (for the shape of my feet) shoes I've worn. Similarly, for pants and jackets I've settled on Uniqlo, jogging jeans (looks like jeans but feels like sweat pants, and is very inexpensive), ultralight down for jacket. I'm also a mech keyboard and ergonomic mouse guy (along with good ergonomic office chair, earphones, etc.), but I would say those purchases don't even come close to all the other things I mentioned above, in terms of qualify of life effects.