There has been some good advice given here, especially the "MOFUDAT" drill offered by pogmothoin in post #32. That drill has long been known as the "Back-To-The-Tip" drill, and I believe it was first introduced publicly by Bob Jewett in the early '90's (I could be mistaken on that, however).
The Back-To-The-Tip drill teaches you the four things that I feel are most important to developing a good stroke, and they are: straight alignment, level cue, staying down, and following through. And the reasons are: Without straight alignment (or at least a straight delivery), the cue ball will not go straight to the target and return straight back. Without a level cue, the cue ball will swerve off-line. Without staying down, there will be no tip for the cue ball to come back to. And without following through, same thing, there will be no tip for the ball to come back to. As Dr. Dave said on his site, it's the best drill ever devised.
Sure, this drill can be boring, but I haven't seen any drills that I consider fun. I guess that's why they're called drills. :wink:
Roger