When you're ML, you need to discipline your mind to stay there with you. If you find yourself thinking about your 'to do' list, make yourself come back to where you are and what you are doing.
I find that if I focus on my H's skin - how it feels under my hand, the smell - that can keep me in the moment. I also try to visualize the connection between our bodies, mostly focusing on his [stuck here, can't use the word I would usually use, but 'penis' is not what I'm thinking while having sex].
Give yourself permission to fantasize during sex too, even if it's not about your H. I have a few reliable ones that I need to focus on to reach orgasm - keeps me in the moment, because if my mind is not in the room, my body isn't having much fun.