1. If you don't lose a bunch of money on this hand, there's something wrong with you.

2. You didn't specify how much you bet on the flop. Given your low set I would have done one of two things: bet big to try to take it down early, or check and look to check-raise big. Mr. 10-2 is probably staying in anyway, so you're hosed no matter what... but for future reference.

3. Checking the turn was a bad idea. Bet hard. You got flat-called on the flop, so the likely hands that are staying in have one diamond (chasing the flush) or two pair (Mr. 10-2 engaging in some wishful thinking). Your confident bet on this street says "I have the best hand right now. Better get out." And even though you didn't have the flush, you were right.

4. I don't like pre-flop raising with baby pairs. Some people will but I prefer to limp and look for a set. It's a fine approach to this hand. Most of the time if you make a set, you'll win... just get your money in and hope. You can in some situations fold to obvious flushes or straights, but in this case you were right to stay in. I will raise with pocket 8s or higher in most games, although it depends on the table - most loose and aggressive tables, I only raise pocket 10s or higher.

5. Flat call by you on the river was probably smart, even though you very likely have the best hand. Saved yourself some money this time of course, but I find a lot of times when you have a vulnerable boat (like the low end trips with a higher board pair) you can afford to exercise a little caution on the end. If you had this boat on the flop I'd be pushing all in very quickly, but on the river you will run into some people who made a boat along the way, and it's not a bad idea to just call if they are showing major aggression.