The way you posed this question should be reversed, to me, what you learn in life should be applied to poker, poker is not life, life is not poker, but the lessons you learn in life should help you avoid certain situations at the poker table, on-line or in person,
Practically speaking pragmatically hearing suspiciously watching is easier in person, but several personality traits arise on-line, just very difficult to apply the same decisions as possible in person as you would on-line.
Never take more than you can afford to the poker room, leave your debit/credit card at home (not hidden in the car), only play tables and games you can afford to play (don't try to play with the big boys, unless you just want to say f it), stay away from lines of credit (they break legs for those that don't pay).
All applies to on-line deposits, make one time deposits without credit card, stay away from the casino games (unless you have money to risk), play low stakes and build a bank or keep losses to a minimum, stay away from cash games (never trust them), play MTT if you have the patience, stay away from rebuy games (unless low stakes).
On-line poker just seems too easy to manipulate and be manipulated by the random card generators (what if there is a black web site that sells generators that control the cards), with the technology out there to hack servers and even if a site is secured (what if the hacker sold the security and has a back door), there are any number of possible ways to cheat on-line (and person, but at least you have eyes and ears).
...ever notice these little smiley faces have no ears?:joyman: