While you are new- here is something that I've personally found.. The kinda thing that would make me drop my bikes early on (I started on dirt bikes, and wrecks were daily occurances!) where anything that would make me stop short- like a low speed turn, and the motor stalls, or something like that. It's pretty easy to do that if you are in the driveway or parking lot. Another thing that seems to get folks are the sidestand- either they forget to put it down, and they get off, or they forget to put it back up, and go around a left corner.
Anyway, the sidestand one you just have to add to your mental checklist of things to check before getting off the bike (or taking off on the bike!) For the stall one, I've learned to avoid those by teaching people this: If you are on a new bike, and slightly uncomfortable with the clutch, try this exercise. With the bike running and in gear, but clutch in (and stopped, your feet holding you), hold on the front brake, and slowly ease the clutch out, just until you hear/see the motor slow down a bit, then pull the clutch back in. You are gettiing used to the clutch engagement here. As you get more comfortable with the engagement, stop using the front brake, and give the motor a little bit more gas. This time, ease the clutch out until the bike moves forward a little bit (your feet are still on the ground holding you! You are only inching forward an inch or two!), then pull the clutch back in, and use your feet to roll yourself back to where you were when you started. Keep doing this until you feel comfortable with the clutch. Sometimes, you can let the clutch out without enough gas, and the motor will start to feel like it's gonna stall- that's ok, just keep your feet planted, and pull the clutch back in.
I've seen more that one newbie (and also add myself to this list) have trouble when first starting out- the clutch consumes your thoughts! One goof on the clutch, and the motor stops, stops the bike in it's tracks, panic ensues, and the bike falls over. This is how I learned to avoid this panic/loss of control. I guess I added this post here, thinking it was kinda my mental training wheels!
Jason