Tips to Improve the Performance of Android

After following each step below, you even can install about 75 apps (1MB each) and still have 15MB storage remaining. You will also get your Android Smartphone is more responsive and the battery can last 1 to 2 days.

Just sync the Inbox
A number of Android Smartphone users choose not to use the Gmail app because it is not effective enough when he had received hundreds of emails per day. But if you use the Gmail app, synchronize only the inbox, not every label. For setting it, open the Gmail app, select Menu> Settings> Labels. Sync the minimum number of days and the label.

Disable On-Screen Keyboard
Disable on-screen keyboard via the Settings> Locale & text> Android keyboard. This will make the phone more responsive. This can only be done if you use Android Smartphone that uses physical keyboard.

Reduce Screen Brightness
Install the free Brightness Level widget.

Turn off unused Process
Install the TasKiller and shut down all processes that do not need. Android will automatically shut off when the RAM is slow but it's usually too late to do because the phone has already slowed.

Reboot
If out of memory or the phone becomes very unresponsive, try to reboot.

Move the content to /cache or SD Card (for experts)
A number of the above tips you can do with a safe and guaranteed not to harm your Android phone. But if you still lack the memory it needs to root your Android phone so it will be more available memory. Do this by moving content to / cache or SD card.
Good luck!