I completely agree with Razbo... the other advice is good too, but I think that what Razbo is getting at probably has a lot to do with getting discouraged. Learning proper technique, chords, & scales are great, but there won't be a sudden defining moment where one day you'll be practicing as a crappy guitar player, and the next you'll be awesome. Everything you learn just adds to your accumulative knowledge that you draw from to create music. Look at guys like Kurt Cobain... he really didn't have a lot of technique, theory, or knowledge of how to play guitar... technically he was not very good. But he didn't let that hold him back and stop him from making music that touched millions of people.

Everyday, you should spend some time just diddling around with the guitar making up your own riffs, chord progressions, whatever. Just have fun and come up with stuff on your own. If you like something you come up with, expand on it... maybe re-work it to make it more challenging, something you can't play but can work towards, but its still your own idea.

As a side note...learning scales can be monotonous, and you may get down a bit simply because if you focus too much on scales you may feel like you're not really getting anywhere. If you like acoustic at all, I'd strongly suggest going though Lissa McCormicks acoustic fingerpicking series. I think you'll find the tutorials easy, and very rewarding, and you can keep working on scales at the same time.