Timehop is a service that was created specifically to bring your old memories across many social services back to you. The service supports Facebook, Twitter, Foursquare, Instagram, and Flickr.
After you’ve connected your services you will be presented with a stream of your posts from a year ago on a daily basis through the service. Individual items in the stream can then be shared to Facebook, Twitter or by email. You can also favorite that item on Timehop and are provided with a link to the original post. Another nice feature is the ability to have your memories get delivered daily by email.
If the desktop isn’t your thing there is an iOS app that you can use that will provide push notifications so you don’t miss those daily trips down memory lane. The mobile app also turns it into a community by letting you add friends so you can reminisce together viewing your historic posts.