Tbh about everything. Most of retail is just an industrial scale of the addage "a fool and his money will soon be parted".
Buy second hand, its fine. You probally can figure it out yourself, try to diy. Look at what people are actually doing not the brand of tool they are doing it with. Its a saw, you saw with it, you can get away with sawing a lot of stuff with the same cheap saw.
Soaps are just collections of chemicals, powerwash for example is just dish soap plus water and isopropal alcohol.
You can probably cook it at home. It will probably be better and better for you, because a pound of lard or cup or sugar looks like the red flag it is when you go to cook with it.
Your bed might be better on the floor, then on a frame.
You are probably better off walking or biking then driving.
You probably don't need to watch more shows anyways so why get fleeced to subscriptions. You probably don't need to play games as much so you can pass on that game. You probally don't need to go out for a drink. You probally don't need to go out for a meal. Etc etc
Honestly, I'm a hypocritical ass saying some of this, but its true. The urge to go spend spend spend, isn't a fluke its just successful sociol engineering to separate us fools from our money.