Money, by Pink Floyd
Money, get away
Get a good job with more pay and you're O.K.
Money, it's a gas
Grab that cash with both hands and make a stash
New car, caviar, four star daydream,
Think I'll buy me a football team
Yeah, sometimes I almost spend a little too much but never to the point when I can't afford eating. If you know how to cook well, eating can be cheap. As others mentioned, repairing stuff can be useful, you can sell things later
And don't forget to DIY some tools. I made myself a variable RPM selector for my Dremel. It's basically a light dimmer in a convenient box.
I also made a selectable voltage AC and unregulated DC voltage source (6 options + AC/DC switch) out of an old stereo transformer. It's very useful for testing the performance of things like amplifiers, testing TRIAC circuits, etc. The unegulated DC is cool because you can test regulators with it. Also in the back it has a long strip of screw terminals breaking out all of the transformer taps internally. There's 3 separate windings, all center tapped. Very useful. You just have to be careful when using the front and the back connections at the same time cause the switch in the front changes between them. Got off topic here, but yeah... DIY doesn't have to be ambitious to be fun. In fact I've had the most fun working on easy projects. Hard projects are satisfying in the end, but small cheap projects are just fun.
Edit - now you just need a thread called
Time