Use TB to back up all your user apps and data. That way you can restore them after you wipe your phone before installing your new rom. Make sure you change the folder for your backup to the external sdcard first. Also, do not back up system apps with TB. If you restore system apps to a new rom you will be replacing files in the new rom and will most likely have problems. You can also back up you sms and call logs and restore them after install.