We had to give our son something to look forawrd to. He wanted to play at these cool parks...which were really school playgrounds, so we told him that kids in diapers can't play there. Once he's potty trained, then he can go to school. We took him out of diapers, as we'd been telling him, on his 3rd birthday and within the week he was perfectly potty trained. 3 weeks later he said, "When do I get to go to school and do I get to ride the bus?" We HAD to keep our word, so we put him at 3.5 in a private school nearby that had pre-kindergarten 3 days a week for 3 hours.
We found that most kids (even adults) respond to rewards. Like now at 5.5 years old, he can't play outside until his homework is done nicely and right. He does it perfec the first time and we have no issues with homework time, since it's up to him when it gets done and how much time is left to play.
Find out what makes your kid tick.
You can also make sure he helps with changing your 10 month's old diapers. he won't like the smell, etc and you can reinforce how much it's not fun to change diapers, etc.