Passed level 3, barely - 62%
couldn't have done it without
Anki for vocab/kanji drills
www.jlpt.biz for past exams
and of course JapanesePod101 for daily listening practice with grammar & vocab thrown in - that time on the bus gets put to good use
A good study plan is here
http://www.shiawase.co.uk/2007/12/03/jlpt3-roundup/
Most likely I'll take it again this year - the jump up to level 2 is huge, but I'd like to really master the level 3 stuff first. Ideally I'd like to get at least 85% if I take it again.