I find it hard to draw walks as well, but I'm always getting better. I averaging about 3 per game now, which is pretty close to the MLB average IIRC.
Some things that I do are:
1) Don't swing until the CPU throws
at least one strike. This means that you NEVER swing at the first pitch, but on the flip side, you will end up with several 2-0 and 3-0 or 3-1 counts. I might make exceptions to this rule late in a game if I'm way up, or way down, mostly to make the game end faster
2) I use Guess Pitch "Classic" so that (when you guess right) you can see that a pitch is out of the zone. You end up with a few 'freebie' walks this way because it takes the temptation away from swinging at that 3-1 or 3-2 pitch if you know it's out of the zone.
3) Depending on the situation, don't swing at the 3-0 or 3-1 pitch even if it's right down the middle. You'll end up with a few walks on the next pitch as a result.