Mental aspect of sales

Just a general question for some of the stone cold killers out there.

How do you stay mentally locked in? In my position, there is times when I just flat out don’t feel like making a call I know I need to make or putting on the headset for a cold call session. I know that just like a sport, you have to do certain things everyday if you want to be successful but I know there are some veterans in here so figured I’d see if they there is any good advice on this subject