1.Try to use only essential widgets on your home screen:
You have to know that each widget on your mobile phone consumes memory and processing power which can slow down your phone
2.Install apps to your phone memory:
Not install Apps in a micro SD card if you have it always Install apps in your phone memory which can be accessed faster and if you have apps in your micro SD card move it in a phone memory using an app called MOVE2SD which is available in the play market
3.Use static wallpapers rather than live wallpapers:
Using live wallpapers consuming power process and memory so if you have them try to uninstall them and use the static wallpapers for your device.
4.Uninstall apps that you do not use:
Uninstalling an apps that you do not use this will help your device to have more free space and less processing power when you are using.
NB:
Remember to close running background apps