I've always loved silicone pastry mats. Their ease of use is unbeatable: You can lay one out on your counter to create an instant surface for rolling dough, or use it as a baking sheet liner in place of parchment. It's reusable, simple to clean, discourages sticking, and takes up very little storage space. This one from Mastrad, however, has the added bonus of providing illustrated measurements that function as easy guides to, say, making a 9-inch pie crust, or a 20- by 30-centimeter tart base (both metric and international systems are represented here). This pastry mat makes baking just a little bit easier—which is always appreciated.
Pastry Mat, $25 at shopmastrad.com