Learning what Chris showed is very good stuff...but I will kinda say what I said before, learn other peoples stuff. Like a good craftsman, you need to be an apprentice. Learn the riffs and solos of all the great guitarists out there. You spend enough time doing that, yo will see why things worked. Almost every guitar player does this. Guitar playing is learning from other great players and when if filters through you eventually, you find that those guitarists you 'apprenticed' with by learning their songs fill in what you do. You learn from what they did and eventually those ideas turn into your own.