how i "try" beat buck fever is when i see the deer walking into the set up i try and get a path to where the deer will possibly travel down get the distance then im ready for the shot.. but i also before i take the shot take a deep breath then glance away for a moment... get myself settled in again and then im ready for the shot.. i understand that sometimes it happens a little fast and personally i would rather have it happen fast because then you can sometimes shot before buck fever hits you to hard.. this is what i do may not work for you but it works pretty good for me.