Definitely keep the binos still and move your eyes through the field of view, rather than pan the binos. The flick of an ear or tail of a coues, step of a leg, or bobbing head of a woodpecker is really hard to see if the bino is moving. For that reason, even 10x do much better on a tripod, even if one does not have 15x. On a recent coues hunt, I had to always keep from being hasty and panning, and kept telling myself I was looking for a jack rabbit under a bush.
I like to start with the close ridges and slopes, and look for the obvious deer that may be out in the open. Then I will go from left2right, top2bottom in a grid picking apart the details. I usually go from the near slope and then move to the next distant slope. Often, I will go back to a slope again as deer may have moved out from behind a tree.
Draping a dark cloth over the head and binos will block light from the side and make it easier to see detail as well as prevent eye fatigue. Use an eye patch with a spotting scope also.
Sometimes a Crazy Creek chair providing back support is nice for sitting many hours behind the binos, rather than just a foam pad.