Whatever it is that you are most excited about right now, focus 80% of your practice time on that topic and let the other 20% of your time be on things like warm up exercises, going over songs, and those items that need upkeep.
By doing this you will set yourself up for more success because you’ll be fanning the flames of your own passion. This is what should drive you to play guitar and practice. As an example, let’s say that right now you are chomping at the bit to learn or improve your sweep picking. You want to sweep like Malmsteen and all the greats! The first step would be to gather some materials—exercises, licks, solos and sequences—that specifically involve sweep picking.