Having too many indexes on a table

Hi I have a table with 10 columns, and row size is 261 and index size is 117. I need indexes on these columns. 1. userid, startdate 2. userid, wcc 3. wcc, startdate 4. sesssionid ( I do not do query on this, But it is primary key for making row unique) I need to know about these problems 1. Is it slows down to have too many index. If it slows down for insertion and delete it is OK. But is it slows down "select " also? 2. If I decrease row size, i.e dropping some of coulmns, does it improve "select" performance. 3. Is there any order for creating indexes. 4. How to do update statistics for this combination Right now I do have indexes on 2,3,4(the listed one). I have data about 400,000 rows. It is slow many times. Could you please mail me sukumar@gte.net Thank you Sukumar Konduru