What NOW?
What now? This question runs through the head of every webmaster when your site hits a slump. The common "writer's block" hits us all at some point. So what are you going to do when you can't think of anything to do? I have come up with a list and some ideas for what to do when you don't know what to do. Remember that a site is never complete. Neopets is always adding new images, new games and new adventures for us all!
Graphics
If you have a graphic site, decide to add a new type of graphic. If you have signs, do you have moved signs? How about just random signs? What about zodiac signs? There has to be some unique type of sign you don't already have. What about layouts? Can you alter one by colorization to make a second one? Changing the CSS colors to make more variety? How about adding more glitters? Have you thought about doing glitter names? What about blinkies? Those are really popular. 
Neopet Guides
Suprisingly, Neopet guides are one of the most commonly used things on a Neo site. But what can you write about? How about your favorite games? You know, the ones under your favorites! You have to have some tips you can write about. What about common things like creating a pet or handling a faerie quest? Just go through your rounds. You can totally run something around that.
Graphic Tutorials
You can easily create tons of tutorials by covering the basics. You don't even know how confusing a new graphic program couldbe. Write about simple things like making a new layer, using a tool, using a texture or a gradient, etc. What thing to you always do to your graphics? Write about that. You have aqquired so much knowledge for your graphic program that I am sure you can think of something you haven't written about.
Notes
What I do when I have no idea what to do is go through my pages. I re-write, update and go.. I enjoyed making that.. let's make another one! One other thing you do when you can't come up with anything is just browse around sites. See something cool? Something that inspires you? Just go with that! I hope I have just made you think a little bit about what you can make next. I wish your site the best of luck and hope you fall out of that slump!