Most of the time even after executing dbcc dbreindex script on database you won't see much improvement in application/DB performance. Thats because dbreindex creates statistics for all tables but it executes sp_updatestats which is like sample statistics.
To get the maximum performance we had to execute Update statistics with fullscan on table. This simple will update statistics of all tables in any given database.
Indexes, Indexes, Indexes
This article has a description of an index utilization tool that Ron Johnson uses to analyze the effectiveness and use of indexes in a system.
2012-07-04 (first published: 2011-07-05)