Adjusting my play -- PP 2/4 to AC live 4/8

[Munga30]

Look left before acting!!! I still remember the $8 I lost when, on the button, I bet the ragged river with my overpair KK and was nearly beat into the pot by a old man in the big blind who called the whole way with a flopped two pair (53o). If I had only looked left I would have seen him with chips in hand, eager to call!