Right now, with an almost 2 year old, and a 4 year old in our house, stickers are our best friend. They LOVE to get stickers and we use that to our advantage.
Eat your food without making a mess all over and you get a sticker.
Go to sleep at night without us having to come in and administer discipline for all the talking, playing around, giggling, laughing, and getting out of bed, and you get a sticker in the morning.
Go to the "Gym Time" class (for toddlers) at church, without crying and making a big fuss, and you can get a sticker.
We don't see it as bribery. We see it more as a reward for good behavior. We don't believe in "I'll give you a reward if you stop doing this.". We expect our children to obey the first time we say something. We don't beg and plead with them to behave. If they don't, there are consequences. If they do, there is a reward. Rewarding good behavior can be a great motivator.