Sometimes you just have to make yourself the priority. Move the OTHER things around to accommodate this important need. If you break down, the rest of it can't be done anyway, so it needs to move to the number 1 slot. Why should your personal time always be the last to have to fit in?
I know that is easier to say than do, but for real, that's taking care of YOU, so you can do all the other things that other's need or want from you.