drupal-upgrade-module-steps
- Check which modules are out of date
- Download the modules from Drupal.org
- Upload the modules to /yourdomain/sites/all/modules (e.g. filezilla or winscp)
- Site Maintenance = Offline for Maintenance
- remove old files (e.g. mv OLDMODULE ARCHIVE/OLDMODULE )
- tar -xzvf NEWMODULE
- run cron?
- run update.php (to resync any database stuff)
- list modules again (ensure they're up to date)
- put site back online again