Ivan, I use markers, so I don't need to refer to measure numbers, I can see that the
Chorus starts here, or
Verse 2 starts here the the
Coda begins here. I've used chord names in the past too:
Em7 D9 that kind of thing to keep track of where I am. Generally, all of my tunes begin with a two measure count in (usually Sticks in EZD) then we're off and running. Your kilometerage may vary, of course.