Nitpick: would have or would've, not would of.

I'm a big believer in Agile; professionally I've found that minimal management and especially minimal process works best. I use Trello to keep track of things that I need to do at some point in the future, or want to spend some time on (in a manner similar to the Getting Things Done advice, if I'm understanding that correctly), and that's plenty.

If you do something more complex, remember to reevaluate your processes regularly, and prune any that aren't pulling their weight.