[Pokey]

Preflop, I'd make it $10 instead of $8, but either way is fine.

On the flop, if I were playing as aggressively as you sound like you were (raising 4 of the last 5 pots and all), I'd have made the bet $15 instead of $20 -- you want to disguise your c-bets, and you don't want your c-bets to have to be full-pot, since you'll need all the pot odds you can get.

Your turn play was weak: that's the time to raise and take the pot away. I'd make it $80ish to go, and expect him to fold anything weaker than a 9. That's fine -- I'd really rather not see any more cards, thank you very much.

On the river, checking behind is correct. If you bet, he's not going to call with anything that doesn't beat you.