How can we take shelter of Krishna when the sexual urge troubles us while we are resting in bed?

Day time is not a problem for the most part – it is easy to do so many activities and engage. However, when Sexual urge strikes when we lie down in the Bed – what activities can we take shelter? Most of the days, due to being tired we immediately go to Bed but some nights the Draconian mind does not let go. We are too tired to get up and do something. The only activity left is to Chant while lying down which sometimes works and sometimes does not.

Do you have any pointers in this regards?