Execute dbcc checkdb and dbcc checkalloc to verify the database runs cleanly.
To prevent concurrent updates from open transactions by other processes during dump database, use sp_dboption to place the database in a single- user mode.
Flush statistics to systabstats using sp_flushstats.
Wait for 10 to 30 seconds, depending on the database size and activity.
Run checkpoint against the database to flush updated pages.
Run dump database.