Do what I do with my better half. We had a talk and I told her, Tuesday is forever known as "Destiny Tuesday". Every other day of my life is hers. Except Tuesday. Last week she wanted to do something on a Tuesday and my only reply was "What day is today?" She replied, "Right, right. I forgot. Destiny Tuesday. Okay, then tomorrow." Have set aside designated play times helps a lot.
That said, she is traveling for work for the next 2 weeks... sweet. I mean, that sucks, will miss her, etc etc
That's good. Sometimes I wonder why some dudes here can't play without their SO hassling them. Negotiate play times.