Essential modules
These are modules I use on every site I build:
Administration menu
Provides a menu at the top of the screen for quick acces to all areas of your site
Pathauto
Generates a friendly url depending on the title of your page
Backup and Migrate
Create manual and scheduled backups of your database and download for off-site backup or migration.
SEO Checklist
A checklist to ensure your site is search engine optimised. It takes you through the essentials but more can be found under Search Engine Optimisation