Well, I think you should play as much different things possible.. I don't think it's possible to first start playing only scales, then arpeggions, then string skipping and then playing songs.. Try to alter everything. Just because something looks difficult, it can still be fun playing allthough you don't master it in 5 seconds..

As well, don't paint your self in to a courner (swedish saying) and play just one kind of music. Most metal-guitarists I know think they should only play metal. Thats wrong.. Try aswell play as much different music ass possible, that will improve your overall skills..

Good luck