If u have a problem and are thinking of backing up ur phone memory and then formatting then its of no use, as if after formatting u restore the backup the corrupted files before formatting will come again.

So here is a better way

1. Backup Contacts - I think the best soft for it is BackupContacts_1.0.zip

2. Bookmarks - Go in c/system/data/bookmark.db and save that file, after formatting paste at the same place as before

3. Notepad - Go in c/system/data/notepad.db ans save that file somewhere

4. Messages - If u have them on ur phone memory then just save the whole of mail folder