Every computer or smartphone for this matter has individual limitations. Some of the problems caused by these limitations can be solved by a few tweaks.
In a nutshell, all you need is create more space in the phone memory, kill unnecessary background processes and update your neo L with the latest bug fixes from Sony.
1. Move all your files and apps to external SD memory. This will create more room for apps and games to store temporary caching data while running, in effect becoming faster
2. Use OTA to install any updates that may have been released by Sony. These updates could fix critical performance issues with your Xperia neo L.
3. Install apps that monitor and kill unnecessary background processes. I would recommend:
- Auto Memory Manager
- ES Task Manager
- Smart Memory Booster