In cash games or other deep situations I often semi-bluff the flop and turn and push the river when I miss. Since I mostly play cash with a group of regulars, this also allows me to get paid off big when I do hit on the river. Also, if you are known to be aggressive, weak tighties will often adopt a calling down strategy, figuring you for a bluff on the flop and turn, then chicken out when you bet their stack on the river. I guess this works in tournies as well, especially if you are a big chipleader.