[Symbolic]

Preflop: Raise. Limping isn't terrible but raising is clearly better as it enable you to pick you more small pots both preflop and on the flop. It also enables us to build a big pot when we hit our set.
Flop: I normally lead here but it's fine to go for the checkraise too.
Turn: Raise more since we wanna get money in the pot and there are also draws out there. I make it $45-50
River: Call. The only hands that worry us are 55, 88 and 42. AA and KK are improbable.