I'm actually surprised at how many of those points I arrived at of my own accord. While I don't necessarily practice all of them, I do know that metering out purchases feels better, I try to weigh the pros and cons of a purchase when I buy something, though it doesn't always work out. I rarely get buyers remorse, probably a side-effect of my packrat nature, everything could be useful, so nothing is a poor purchase. I tend to buy things to facilitate purchases. As in, I want to have the experience of building a quadcopter, so I buy all the materials. Or I want the experience of working to perfect my home network, so I buy the equipment I need for that.

5 years ago I had just taught myself PHP and knew only basic SQL selects. At that point I was helping a friend maintain and improve a game. The code was horrible, what's worse is that it was replacing worse code.