Building a Bankroll

[TITHEAD]

I wanted to get some feedback on how i should really build my bankroll higher. I am a student and i play anywhere from 4-10hrs a day. As my funds are low i only ever start on a site with 50$.
Over the past 10 days i have slowly managed to get my bankroll up to the 305$ mark and yes i know its not a lot but i think its quite an accomplishment.
I play very tight aggressive poker. I raise 3BB with any hand and then another BB for any players in the hand already. I also lay down anything to big raises. I found this tactic has stered me clear of trouble and as a result i have built my roll up a little.

I guess the main question i am really asking is should i just keep on doing what i am doing and build my roll slowly or should i try different more high stakes games? I mainly play 25$max NL and occassionally 50$NL. WOuld the jump up a stake destroy my game ? Should i be playing some limit poker?

Any thoughts or ideas would be great