Other then using the email feature, there are some other useful way to use Gmail
- use it as bookmark - from lifehacker
- virtual drive on your pc - by Gmail Drive
- as a firefox extension for file storage , imagining how powerful with portable firefox - by Gspace
- use it as a blog - by Gallina
- as photo gallery - by Goollery
- as a Rss Reader - by GmailRSS
- as your todo list - by GmailTodo
- using as file sharing platform - by G2GShare
you can learn more tips on GmailTips or check whats new feature of Gmail
