You can create Indexed view - add Index on the view.

As per BOL:

"An indexed view is a view that has been materialized. This means it has been computed and stored. You index a view by creating a unique clustered index on it. Indexed views dramatically improve the performance of some types of queries. Indexed views work best for queries that aggregate many rows."

Refer: http://msdn.microsoft.com/en-us/library/ms191432.aspx