Like one out of two posters replied: it's important to practice a lot, that's the key. But the thing is, you can't see it as some boring homework you HAVE to do. Try to practice a lot but stop it when it's beginning to get boring. As time passes, and you get better, you'll see that your practice sessions will get longer and longer. You wont want to put down your guitar unless you really have to. Welcome to the wonderfull world of guitar playing.
Dave