1.Only buy games I know I will enjoy and dont listen to any hype unless i completely agree with it
2.I agree, rent more games, save money, get more done
3.finish many of the games i own and have never bothered with (for example i wont play baldurs gate too long and old now, but I will play through ff7, ff10, sins of a solar empire, company of heroes, legend of zelda OOT etc.
4.Dont buy a single fps game, only rent them.