How can I be more aggressive?

[BlibbityBlabbity]

My comments in bold above.

Seems to me that a lot of the aggressiveness in poker comes in trying to take pots down WITHOUT a showdown. If you are almost assured of having to show down the best hand, it becomes more of a drawing game and rather than trying to raise your level of aggression you should focus on getting money in when you have the best hand or good odds to draw to the best hand.

The Lee Jones book on low limit hold'em covers this exclusively and I think it is very useful in isolating the concepts for playing against players who will not "get the hint" when you check raise them or raise for a free card. They will still be happy to bet middle pair even after your flush hits.

As you move up in levels the aggressive moves become indispensible to being a winning player. At micro-limits, the OVERLY aggressive players tend to get either get a lot of good hands and win a lot or lose their buyin in 20 minutes.