I have never been a great drum tuner (even though I've been at this game for 30+ years). Sympathetic vibrations are the bane of my existence. Tral and error, re-tune, de-tune, sigh.
If you haven't, you should really check out the various stuff Bob Gatzen has put online (as well as his DVD). I wouldn't call myself an expert tuner, but that really helped demystify a lot for me.