I'll second everything biodino said in regards to BR management. I will add that even if you have the BR, it doesn't mean you have to move up. I'd look to get an absolute minimum of 5k hands in at each level you play. As you move up, increase this to 10k and beyond.

Regarding win-rate, look for 3 big bets (or 6 big blinds) per hundred hands as a sufficient winrate to indicate you are beating the game. At most levels, you should be able to get many times that with optimal play, so certainly strive for 10bb/100 (that's 20 big blinds) at the lower levels.