8. Back up your filters

Enable the Filter import/export Labs feature and you can back them up (and restore them) from the Filters tab under Settings.

9. Send blocked files

Gmail's anti-virus technology translates into this: it'll block any file with an EXE, OCX, BAT, COM or DLL extension, even if it's ZIPped up. You can bypass this simply by renaming the file extension to TXT, but don't forget to tell your recipient what you've done, and remember you'll be breaking Google's codes of conduct, so don't make a habit of it.

10. Drag and drop

Fancy using all that spare capacity on your Gmail account as a back-up drive? Windows users should install Gmail Drive, while Mac users should check out gDisk instead.

11. Import mail into Gmail

You've got two options here, both of which require you to enable IMAP access in Gmail (under Settings > Forwarding and POP/IMAP). First, import – if necessary – your mailboxes into Thunderbird and then use Gmail Loader.

Gmail loader

IMPORT EMAIL: Upload your Thunderbird mailboxes to your Gmail account quickly and easily

12. Transfer selected messages

If you only want to transfer selected messages without forwarding them, set up your Gmail account in IMAP mode alongside your existing accounts in a supported application (Outlook, Windows Live Mail or Thunderbird), and then simply drag and drop those messages you wish to upload into Gmail.

13. Use multiple Gmail signatures

GeekFG enables you to create multiple HTML signatures for different accounts or requirements. Each is stored as a bookmarklet which you just drag and drop on to the Compose mail window when you want to use it.

14. Custom Gmail signatures

Fancy creating a signature that adds the latest blog post from your site? Assuming your blog has a site feed set up, just download BlogSigs, which also works with Yahoo Mail, Hotmail and Outlook.

Blogsigs

PROMOTE YOUR BLOG: Add a link to your latest blog post to your email signature

-------------------------------------------------------------------------------------------------------

Liked this? Then check out 40 brilliant Gmail tips, hacks and secrets

Sign up for TechRadar's free Weird Week in Tech newsletter
Get the oddest tech stories of the week, plus the most popular news and reviews delivered straight to your inbox. Sign up at http://www.techradar.com/register

Follow TechRadar on Twitter