Hey I tell ya what. Post us a full picture of your tank, what fish you have in it at the moment and maybe you can get some really good suggestions.
I to about 3 months ago, was just about to fold my 10 gal nano of 4 yrs. I understand where the loss of interest comes from. Every Dec/Jan those are the hardest bleak times of the year. You get that need to buy to change something......
I am starting to really understand that even with a nano tank you have to have very interesting things to see and watch in it.
I have always had clowns mainly, I love these fish dearly and will probably have one all the time.
They can be quite boring little fish, just bobbing up and down rolling the anemone etc.
Just recently I have taken back to the LFS my black and white Saddleback clown. She was getting to big, creating a sand storm in the tank, destroying an anemone that had split and was quite tiny. She really needs a bigger tank.
I now have 1 false perc, 1 firefish, 1 yellow watchman goby It is very interesting how my mood changed once I added this firefish, it is always right out infront. Beautiful color fun to watch and then the bobbing clown still does its thing, the watchman pokes its head out, cruises around the tank and just adds that splash of color too.
I also added some very small frags of stary polyps, button polyps, and a red open brain.
My interest is there now.......
Post us a pic