Tips and Tricks for JellyBean

1. Expand Notifications and Swipe
    You can now expand notifications by just sliding down notification by two finger to peek that notification or reply to message, call or share. Swiping the notification will close that notification.

2. Quick Access to Rotation Lock and Settings from Notifications
    Now, notification or the status bar has settings and rotation lock in stock android jellybean which can be used to access settings and set screen rotation lock

3. Re-Sizing the Widgets
    Jellybean allows users to re-size widgets just by long pressing the widget and then using the rectangle to set the widget size.

4. Flying the Home Screen Apps
    Now, the app can be removed from home screen using finger to flying it up.

5. No lock Screen
    Some users would prefer to unlock the device quickly just by pressing the power button without going through any lock screen. This can be done by selecting none in lock screen option under security in settings.

6. Disable/Enable Notification for Specific App
    User can disable the notifications by a particular app by going to apps in settings and Un-checking the show notification in app information.

7. Quickly Adjust Volume and its Settings
    User can adjust volume quickly by just sliding seek-bar shown on screen when volume up and down are pressed in stock android.

8. Blink to Unlock
    Now, face unlock has become intelligent to identify between photo and real person by just enabling the blink feature under settings.

9. Multiple Faces for Face Unlock
    You can improve face unlock just by using improved feature under lock screens in security tab. It will improve face matching.

10. Developer Options for More Customization
    You can customize the window animation delays from the developer options to make your android look more fluid. You can force GPU to deliver more by enabling force GPU option. You can put limit on background processes using developer options.

11. Browser Tweaks
    Long pressing the image in browser and selecting set wallpaper allows you to set it as wallpaper. You can enable invert rendering option if you like using device for surfing in dark to save power and protect eye strain by going to options and then accessibility, enable invert rendering. You can enable quick thumb controls by enabling it from the options ->labs.

12. Take Screenshots 
    In stock and other android devices press the volume down key and power button simultaneously to take screenshot even able to take snap of the lock screen. Also screenshot can be taken in some devices like HTC and Samsung by just pressing power and home key together but that doesn’t work for lock screen.