Here's an idea that came to me as a result of reading another blog, Kim's Counseling Corner. She is a child therapist and so her blog has a different slant from mine, but, I find that she has some wonderful doing-type ideas.
In this case, what got me thinking is her idea of having family members put down on a piece of paper an activity that they would enjoy and place it in the Family Activity Jar. On some regular basis (once a month? once very 2 weeks? -- whatever fits your family schedule), a paper is ritually drawn out of the jar and the whole family does that activity together. The purpose is to increase positive family time. I would add that it is a democratic family experience for the kids---well, for all family members, really.
How do you and your mate put fun into your relationship?