Take inventory of your obstacles. Work and grad school and marriage and children are legitimate pulls on your time, so the question is how to balance them. It's not easy. If you have to drop your kids off or pick them up or be back home in time to be with them, the bike commute could be tricky to fit in, *IF* it takes extra time compared with your other commuting mode(s). But you can work it out if you want to. Maybe it's weather. Maybe, for example, if you promise yourself you'll head out on the day it will remain above 45ºF all day. In that case, watch the forecasts, and while you wait, get the bike and gear ready to roll out the door.