A few critical tables would be a good start, particularly large child tables that are currently clustered on an identity column.
Edit: Be sure to include any "missing index" (query 1) and "index stats" (query 2) results for all tables. Note that there may not be any results from query 1 for some tables.
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".