In regards to triplets, my teacher and I went through an interesting lesson on CLAPPING. My timing is pretty bad as I tend to speed up and slow down at random. So, set a metronome at a standard slowish pace and CLAP or slap your knee on every "ONE" beat. That's easy. The interesting thing is clapping ONE-two-three, ONE-two-three, ONE-two-three, with the emphasis on the ONE. That's a triplet. The exercise was to clap ONE-two (half notes), ONE-two-three (triplets), ONE-two-three-four (quarter notes) and so on. It's SO much easier to just clap until you "get" the tempo, then try to play it. Think of stuffing more notes (or claps!) between the "ONE" beat. Hope that makes sense. :)