From monitoring your Gmail session as I pointed out previously, another setting can be changed to help secure your data with Gmail. It is particularly wise to use an encrypted session for your Gmail at public access computers or over wireless connections.
Log into Gmail.
In the top-right corner, click the Settings link.
This setting lies under the first page that comes up, the General tab.
Scroll all the way down to the bottom. Click the radio button next to ‘Always use https’. Then hit the ‘Save Changes’ button.