Search for units that have historically had leftover tags after a first draw. Note that almost universally these units will not have as good of access/public land as the units that are fully subscribed. Putting yourself in for that unit will give you good odds to draw. (Of course if you are thinking of applying now for Wyoming, you have no idea if quotas will change or stay the same from last year, as you are applying 3 full months before the quota is established).