With my first son I went immediately to a candy-based rewards system when potty training. I figured that straight-up sugar bribery would get us to the finish line in no time. I was amazed to discover that visual rewards like sticker charts actually worked better for my kid, as they allowed him to see how far he'd come as a potty user. And all without the sugar crash!
So with son #2 I'm skipping the candy and using the Diego's Potty Training Progress Chart from the get-go!