A simple meditation technique can help.
Focusing on our own breaths whenever our minds start to wander can help us relax and be more in tune with our immediate surroundings.
If you can reach some level of a meditative state while birding your heightened senses can enhance the experience.
You become more aware of the sounds of your footsteps. Bird chatter in the woods suddenly sounds like a symphony with each bird playing its own instrument. Birds stand out in vivid detail through your binoculars.
It takes a little patience but meditative birding is worth the effort.