It is a busy time of year. However, you still can accomplish a lot. Granted, the telephone comes first. The customer comes first. You need to earn a profit while you can. So, no complaining that it's busy! No grouchiness because everyone is tired!
If you are like me, we try to cram too many things into a week or month that we know will be incredibly busy and set ourselves up for failure. Then when they don't get done, we feel bad about it.