The best way to improve at making drum sounds for your tracks is to study the way professional drummers play and how your favorite tracks are programmed.

Pick out your favorite drum loops from your sample library find a nice 2, 4, or 8 bar section of the main drums for 5-10 of your favorite songs. Using your own sample collection, start recreating the loops either in MIDI with a drum rack (like Ableton's drum rack or NI's Battery) or laying the audio out on a timeline.

Start paying attention to what drum hits play when. If the drumming sounds more realistic, see if you can envision the drummer playing the physical kit (which is also a good way to learn how not to overprogram your drums - if you couldn't do it with two arms and two legs, maybe it's too much for the loop!).

I often put a loop into my DAW. And then kind of replicate it but using my own sounds, and changing the timing slightly. By using this basic guideline I find it makes making loops much easier.