Playing winning online poker means learning to analyze betting patterns. Remember that people's habits create "tells" that you need to pay attention to. Online Poker is now coming into its awareness, and the automated part of it can be your key to detecting sudden changes in another player's behavior.
Many online players are now regulars, which means they get into rhythms. Some of these rhythms may have weak points that may be exploited, but it's the breaks in rhythm you need to spot. Learn to notice that another player is getting reckless and is playing beyond his / her ability. Even more important, watch for signs that a bad player is about to play very badly.
Players who rant, have their chat revoked, gloat after a winning pot, challenge a "heads-up" after losing twice in a row (or lose badly several times in an hour or so) are people who are showing their limits. It's up to you to figure out how to help them give you more of their money. A good target can be the player who lectures about how to play, but is very wrong, short term. They seldom last long and are often first time players.
It's the automated functions of online poker that give you advantages you can not have in a casino. Auto-check, auto-bet, auto-raise, multi-table play, etc., all mean you can detect changes in the pattern of play that are unique to online Poker. Knowing the meaning of a specific change can help you make the long-term money a player with self control describes.
Generally speaking, any time a person who has been on "auto-pilot" and suddenly appears to have switched to manual is giving you a tell. Only your experience and brains will allow you to tell if it means something, without confusing it with "it means the same thing whenever it happens."