try to focus and just think about the task in hand. your job , once it is over then think about the other stuffxxxx
i was told once to tryt and imagine a row of packing boxes in your brain, lable each one, in your case, work, home, sundayschool, kids, partner, .... then sort out your thoughts into the right box, just as if you were filing your bills. then close each box, store them in the darkest area of your brain, only allow yourself to open one at a time, right now it would be your work box that is open, all thoughts that are not work related you have to keep in thier box, if they come out put them back telling youself that you will deal with it when you next open that box, until then it is safe and not important. it sounds crazy but it really helps you focus on one thing at a time