Personally I'd recommend finding the cause of the deadlocks and resolving that (usually bad code or bad indexing) rather than putting nolock everywhere. It can have some interesting effects (read uncommitted data, read rows twice, miss rows entirely and the like)
Nolock's basically saying to SQL that you don't mind if the data's not 100% accurate.
Enabling traceflags 1204 or 1222 will write the deadlock graphs into the error log. With that info, you can identify the processes involved in the deadlock, what procs and what queries in the procs they were running at the time. You can also see the deadlock resource. With that information, 8it should be possible to fix the root cause of the deadlocks.
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: Discussions on DB performance with occasional diversions into recoverability
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