A while back now, I wrote an article for Dan John's newsletter "Get Up" entitled "New & Expecting Fathers: Tips for Training and Time Management". One of the tips I gave in the article was to "front-load your training week". It means to plan your most productive training sessions for early in the week (Sunday, Monday, Tuesday). By doing this, even if your week becomes a bear and you miss training later in the week, you will have gotten in at least two or three good sessions.
If your having trouble making your training commitments, give the "front-load your training week" idea a try and let me know how it goes.