Go to http://www.tigerbill.com/subjects/drumlessons.htm and you can get some instructions on technique.  Other than that your probably gunna have to analyze your current technique and maybe get a drum instructor

Also, our wonderful host Bart offers video correspondence lessons.  Basically, you would send him a video of you playing and he can look at your technique, etc. and make a custom video lesson with pointers on your specific technique as well as anything else you may be interested in learning.  I haven't done it yet, but its on my list.  I've heard other cafe members say it helped them a lot.  If you drop him an email at www.bartelliott.com or via IM here at the cafe he can tell you more about it.