Practice Tip: Think Small

That's right, you don't have to practice everything.  Pick something that you want to get good at.  It doesn't need to be an entire song.  It could be as simple as learning to hold a chord and getting all the notes to ring without buzzing (a D chord for those of you just starting.  Bar Chords for all the advance players).

When you keep it small, you will neglect practicing other things.  However, as a result you will master a specific thing rather than just being familiar with everything, but not able to perform it.  When you master that one thing you have had a success!  Little things add up over time.