D.,
I am currently training my 3 y.o. son, so I understand your pain!
Here are some ideas for you:
Have two different types of potty seats: one stand-alone potty chair, and one that you put on top of the regular toilet seat.
Take him shopping for "big boy" pants, and let him choose which ones he wants to wear.
Start by rewarding him with stickers, hugs & kisses, candy, or whatever when he tries to go potty. Then, when he starts to get the hang of it, only reward him when he does go (even if it's just an attempt, I would still say, "Good try, buddy!"). We're still waiting for the miracle of going #2; for which he has been promised a big present! :)
Since I have been on maternity leave, I took a week of him only wearing real underwear (no Pull-Ups, except at night); and he learned to dislike the wet feeling when he didn't make it to the potty.
We're still working hard at it, and some days are better than others; but we'll get there eventually! Good luck to you and your little guy! I hope this helped!
~E. in New Lenox