This is what we did with my 2-year old, maybe it will work for you:
1) Use underwear exclusively except for nap and night. Even if you leave the house. It will force you to take them more often and they get used the idea. They have plastic underwear/training underwear to minimize the mess. Expect accidents and don't get frustrated. I would expect a certain amount of accidents a day and if it didn't happen then it exceeded your expectations!
2) Use some sort of reward system. We used a sticker chart and my daughter loved it!
3) Anytime she wanted to do something, I told her that she had to go potty first. If she wanted to sit on the couch, she had to go potty first. Watch a show, she had to go potty first, etc.
4) If she refused to go potty, I gave her a choice. She could either go in the big potty or little potty and that was the choice. That was a hard balance. If she really didn't have to go, then I just would take her again in maybe 20 minutes or so.
5) Read potty books, watched potty videos... just talked potty language all the time. I got so sick of talking about it; however, it just made it more normal for her.
Good luck!