You should probably not log in for a few days at all to shake the need to login and get a happy prize. These games have lulls in them, and then bursts of activity when something changes or something new is around. Keep in mind the pace of progression is geared toward a dedicated free player - those are the guys that will feel the most satisfied with continual progression for leveling anyway - if you're a pay player you're paying to run out of content faster in some ways, so you need to take a different approach mentally.
