Since you carry your smartphone everywhere you go, you've probably filled it with snapshots you never want to lose. Many cloud storage providers can help you back them up. If you have an iPhone, you can use iCloud to back up your last 1000 photos and sync them across your devices. Windows Phone users can find a similar feature for SkyDrive. Google+ for Android has an Instant Upload feature that automatically sends your snaps to Google's social network; your photos will remain private until you choose to publish them in a post. Dropbox recently added an feature to its Android app, and Canonical's Ubuntu One offers automatic uploads for Android and iOS.

Why bother searching through many months' worth of email to find attachments when you can just save everything to the cloud? Many desktop mail programs will let you specify where attachments should be saved. Then, whenever you download an attachment, it will go to a single folder that you can access anywhere.