Top 10 Wait States in SQL Server

 select top 10 *

from sys.dm_os_wait_stats

where wait_type not in --remove common waits to identify worst bottlenecks

( 

'KSOURCE_WAKEUP', 'SLEEP_BPOOL_FLUSH', 'BROKER_TASK_STOP',

'XE_TIMER_EVENT', 'XE_DISPATCHER_WAIT', 'FT_IFTS_SCHEDULER_IDLE_WAIT',   

'SQLTRACE_BUFFER_FLUSH', 'CLR_AUTO_EVENT', 'BROKER_EVENTHANDLER',

'LAZYWRITER_SLEEP', 'BAD_PAGE_PROCESS', 'BROKER_TRANSMITTER', 

'CHECKPOINT_QUEUE', 'DBMIRROR_EVENTS_QUEUE', 'LAZYWRITER_SLEEP', 

'ONDEMAND_TASK_QUEUE', 'REQUEST_FOR_DEADLOCK_SEARCH', 'LOGMGR_QUEUE', 

'SLEEP_TASK', 'SQLTRACE_BUFFER_FLUSH', 'CLR_MANUAL_EVENT',

'BROKER_RECEIVE_WAITFOR', 'PREEMPTIVE_OS_GETPROCADDRESS', 

'PREEMPTIVE_OS_AUTHENTICATIONOPS', 'BROKER_TO_FLUSH'

) 

order by wait_time_ms desc