Install application that you realy need it
Install unnecessary application will reduce storage memory. Sometime free memory from storage use by system to increase their performace
Close unnecessary applications
Today tablet is not like PC, open many applications at one time will make memory suffer.
When it`s happen then the first thing that will reduce is the tablet performance.
Pick application that doesn`t need lot of resource
The main suspect is game application, some game need more space and when it`s run took a lot of memory resource. Other application such as photo editor also took a lot of space and memory resource, but using application that you need is different case with application that rarely use.
Deactivate GPS / maps
Almost all tablet is has GPS, but are you need it all the time? Active the GPS all time will drain you battery, the system will cut the tablet perfomance to keep the device can stay a litte longger.
Animation when open or close menu, took memory resource too. Deactive the animation will help memory to have some free resource that can allocate for tablet performace.
Turn off the animation: Settings > Display > Animation > Select No Animations
Do not use live background
Look!! i can see a fish swiming on my tablet!
Ok, it`s fun somehow to saw something moving in your screen. But you must know that live background still active even you open an application with full screen.
In android market, you can download free application that will help you to manage start up in android. using startup manager you can activate or deactivate or uninstall unused application.
Delete widget and shortcut
To many widget (especially that need sync with server) and to many shortcut in desktop will effect to tablet performance.
Use application cleaner
Application cleaner will help you to clean the file cache and history (browser history), save some space will help the tablet performance