Don't be tempted to move up, though, until you have the full bankroll. 1/2 stack $25NL is still $25NL, not $10NL
not sure if i entirely agree with this. Bankroll management in no limit is typically described in terms of buyins (not blind size). Unless 50bb is higher variance than 100bb then you're rolled for 50nl -20-50bb with bankroll $750 (assuming a 30buyin rule)