I like how boom beach has a daily reward system. I think clash of clans should have a building where once every 24 hours, you get some kind of reward for logging on daily. The catch would be that this building, let's say the "reward Hut", can only hold rewards for a day so it's not automatically loaded, you have to collect it to get it. The reward could be a little of all resources, a random resource based on chance, or something random like a free troop or spell. This would give the game something to wanna keep coming back to! Attacking gets old after a while.
