What problems are you having? The only thing I would suggest to the removal of background apps that might be stealing memory and resources. Most remove themselves from memory automatically when in the background but some fail to clean up after themselves. And some apps can run in the background (music, audiobooks, Navigation), so make sure those get closed down if you plan to run an intensive app in the foreground.
I haven't found any app my iPad 3 can't handle, so I'm interested to know what app you are need more performance on. Finally, there is iPad 4.