I've had the same feeling, alix.
But everytime I have that feeling,
I completely change the tank, get a new tank, new fish, coral, or SOMEthing new to look at, research, experiment with. Even playing with the aquascape can settle me down for a month or 3..
Try getting a nano tank.
I've always wanted an 8 Gallon BioCube, and I definitely want a 20 gallon Long.
I think those two nanos could be pretty fun to play with.
Just a thought.