This is an old tip but I thought I'd bring it up again. If you have something like a recorder where you can microphone your tablas and monitor it through headphones. It can be a useful tool. I like to do this once in awhile with a minidisc recorder and lahara machine. Set the volume so you can here everthing very clearly. This is excellant for teaching you how to improve the quality of your sound, balance the volume of your bols, and find problems in your sound. It also helps smooth out your hand movement as you don't need to hit as hard. switch practicing with headphones on and off and even record it and notice the difference . Of course don't practice like this all the time but it's great to do for a couple of weeks your sound should improve noticably.
Thats a great idea. One drawback, I don't have a lahara recorded. If you have one (or if anyone has a good lahara in teetal-vilambit, madhaym or drut), I can definately trade you for some great RARE tabla solos. Let me know. firstname.lastname@example.org