I gloss over it. I'm more apt to do this if I am writing about the course of a day and something important happens at the end of the day-- for example after a long weekend visiting, one of my characters has to take her long distance boyfriend to the airport. She's dreading it and she wants more time, so I probably wrote like 2 paragraphs of them 'spending time together' throughout the day, to get to the late afternoon when they're in the car, on the way to the airport.

Either that or I just skip it altogether and if someone says it seems weird, I try to add to it.