Car wont start...only sometimes though.

Hey guys

Ok, I have a 97 Z24 cavalier... about 135km on it and recently its been giving me some starting problems...occasionally it will studder when I try to start it and then turn over... or sometimes it wont turn over at all. This morning I must have tried at least 25 times before it eventually started. Now this isnt common.... happens once in a while. Is this a problem thats easy to pin-point or could this be a number of different things?
Thanks in advance!

You might need to replace the starter and solenoid. I think autozone tests starters so you might want to have it tested before you go and replace it. When you try to start it and it does not start do you hear a whining noise or even a clicking noise? Also I had this problem on my grand am. after I replaced the starter, I had to replace the ignition switch. So I replaced the starter for no reason.