The best tip I have for potty training is to encourage but not push. My first son was 4 before he was completely potty trained. My second son was 2. I'm suprised that my third son hasn't already managed this accomplishment . He's already 7 mths.

Oh, and be patient. No matter how many people say "he's not potty trained yet?" don't panic. They do this at what ever age it happens. That or say "you mean you already potty trained them?"