What sort of eye condition do you have? What sorts of contacts are you getting?
Some basic notes:
A) You may notice at first that your body doesn't want you to put stuff in your eyes. You may have trouble maneuvering your fingers so they plop stuff in the eye. Strange, isn't it, how our bodies are ill-disposed to doing stuff like that?
B) Red tip means "don't put in eye, moron". Never mistake a red-tipped eyedropper for a clear one.
C) Carry a spare contact case with you, and if possible, some glasses.
D) Don't mess with your eyes. Follow the handling directions precisely.
Basically, no blood goes to the cornea (which is why cornea transplants are so successful -- almost no chance of rejection), so that part of the body relies on tears to keep it clean (think bacteriological content of a fast moving stream). Contacts put someting solid in there, giving an opportunity for crap to grow. So make sure your handling procedures are as sterile as possible.
Yeah, sure, I've seen people do really stupid things, like pick a contact off the floor, rewet in their mouth (=highest concentration of bacteria in the body) and reinsert them; and I've seen them do it with no ill effects. But if you're like me, you value your vision.