I'm having this same problem man. My character's stats are coming together beautifully and I am almost done with all my goals. However.... I still have SO MUCH damn questing to do. My original plan was to slowly plug away at the quests as I trained, but I kept putting it off and now I need about 65 quest points in order to get barrows gloves, aswell as to train all sorts of non-combat skills in order to do alot of the pre-required quests. I am really not looking forward to taking on this task and am seriously considering paying my little brother real life or RS cash to get him to spend a week doing all the quests for me on my account lol.
Motivation tips would be greatly appreciated!