It may help to look for a group of enemies you want to raise your like against (or possibly lower, I suppose!). That way while you're hanging out there, you're both gaining XP as well as helping adjust that.
That happened to me when I was working to increase my like with the red orcs as well as the Northcrest guards - sticking around that region (and retreating to Feliar's to rest!) got me a lot of XP after awhile.