Fantasy Baseball How To:

Effectively improve your team via the waiver wire.

By this point in the season, you've probably come pretty close to recognizing what all your team is strong at, and what all categories they could use some help with.
If you aren't really sure, take a look at your accumulated stats (there should be a link for this somewhere on the league's homepage) and see what categories you need help with-I prefer writing down each category that I feel I need help with.

With this information at hand, you should start to focus on stats on the waiver wire instead of big names and/or numbers that you are already in good shape at.
For example, lets say that you are 2nd in your league in home runs but only ninth in stolen bases, but some one has just dropped Chris Davis whom you have had your eye on since before the draft. Obviously you would be tempted to pick him up, but instead try to find an unheralded speed guy. You can still make room to put Chris Davis on your team, but finding a speed guy needs to be your top priority.

Pitching, on the other hand, can be a little more complicated though, depending on your league's scoring settings.
If your league has a category for Innings Pitched along with all the other 'normal' stat categories, it may be wise to have an extra starter on your team in place of a reliever, but don't go overboard with this. Don't sacrifice your ERA, WHIP, Saves, and Walks just to try and gain an advantage in K's, Wins, and Innings. If you'll do the math here, you're hurting your team by doing so.
Slowly throughout the year, try and pick up starters who flying under the radar but performing very well and you may be able to pick up a clean sweep in pitching categories once in a while.