When you plan your meditation, it’s much more likely to happen. The best time to make the plan is when you come out of your morning meditation. “What do I have on today? When do I have a gap?” Pick a time and commit to it. Then when the moment comes, keep the appointment with yourself, sit down and do it.
A couple more things: You don’t need silence to meditate. Experiment. Try doing it somewhere new—public transport, a cafe, the church around the corner from work, that quiet(ish) room at the gym. As a last resort—the loo!