Google is currently rolling out the new features to English-speaking users of Google Mail and the most popular ones will stand a chance of becoming permanent.
To find the new features you'll need to sign in, click on the Settings tab and then the Labs tab. You can then choose whether to enable or disable them.
Google product manager Keith Coleman outlined some of the new, experimental features.
"Some of them we've found really useful, like Quick Links, which lets you save searches and any other views in Gmail," he said.
Coleman said that those that prove popular will be kept though the ones that aren't will be retired. There are 13 new features in all.