Poker player experts always emphasize betting position at the table the way Realtors always espouse location, location, location. Betting position is a key element in your decision making and betting. Obviously, from late position you have more information to draw from.
When you think about position, it is not only your seat that you should take into account, but who is betting ahead of and behind you. Whether you are in early, middle or late position, the aggressive poker online players at the table should be part of how you design your play.
Always think about what you can expect from the poker online players behind you. For instance, the flop gives you trips in middle position. It is an obvious hand to all, so how do you play it? When there is a loose aggressive behind you who dependably bets on any show of weakness, you can go for the check-raise. When the aggressor bets out and everyone else folds, you have effectively placed yourself in last position for the round because you have the option now to re-raise the aggressor. Any smart player would recognize this trap and fold.
When up against aggressive players, think about ways you can usurp the last bet through slow playing and check-raising to put them on difficult decisions.

