When I manage to build my stack up to 3 or 4x, I find myself playing scared and/or more loosely than I usually do. What remedies are available?
1) Learn to play deep stacked. Probably the right answer, over all.
Playing scared is a lack of confidence (ironic given the large stack won!) This is a leak for me; you can't ever play scared. I think too much about my bankroll when I'm playing, and that's really the issue.
Loosening up can be right, but not playing against the odds
2) I don't see banking the gains by leaving the table as the wrong answer. If you're not playing your best game, it's time to stop playing.
As far as bullying goes, I agree with the posters that it's hard to do at the micro's. Folks just call too lightly. TAG play is fine, but bluffing is probably -EV at this level.