This is an old post but still a relevant topic. If you are playing for fun, you obviously dont want to let poker consume all your time. But how much is to much is very individual, and it can certainly be more than one tournament per day. Especially since you can multi table online. And if you play for profit, you NEED to put in volume, which mean way more than just one tournament per session. Could be 10 tournaments maybe depending on, how it goes. The more early bust-outs, the more tournaments I usually end up playing per session.