Well first, search for triplet on the forums. This topic came up awhile ago, and I'm pretty sure that it was explained rather well...
Basically, a triplet is 3 notes in the space of 2. For example, if you were to take a space of one beat (that's
2 eighth-notes), and crammed three eighth notes in the same amount of time, it's called a triplet. It can be done with any kind of note, from whole to 32nd....
"swing" or "shuffle" feel is when the downbeat of an eighth-note gets more time then the upbeat. If you have the cash, buy finale. With finale you can write songs and, if need be, put them into swing feel. The difference it makes is that is generates a forward motion in the music. Listen to a classical piece by Segvia, and then listen to some bebop by Charlie Parker - you'll hear a difference in the eighth-notes.
In standard jazz or blues notation, it has been agreed that a shuffle feel for eighth-notes (this is basically the only thing that is affected, but it still changes the music drastically), is like this - a quarter note and an eighth note in a triplet. This doesn't sound like it could be a triplet, but a quarter note is just like two eighth notes - therefore there are still three eighth notes in there. You can also do this on finale, but if you don't wanna buy it - there's a program called noteworthy composer that is free to download, and you can create quarter/eighth triplets to hear the sound... but it doesn't do shuffle feel....
Powertab may also do shuffle feel...
There are only two important things in life - There's music and theres girls, not necessarily in that order....
The Ace's Guitar Tricks