How to create backup for android applications without rooting

For non-rooted android Mobiles :

1. Install file explorer from android market (free ).
2. Move the android applications (which you want to backup) to sdcard using task manager.

3. Now open file explorer and go to /mnt/asec
4. You can find your moved android applications inside it.

5. Now copy the folders you want and paste it in your Removable sd card.
6. Connect your mobile with pc and make a backup of your favourite applications.

For rooted android Mobiles :

It i s very simple for Rooted mobiles.
1. First install Titanium backup (free version available in market).

2. open and select the backup/restore options to create backup.
3. If you want you can backup your system files also.