Suregena~ I temp in the mouth same place everytime. Under my tongue on the left side. MY bbt is on my nightstand- the second I wake up (typically same time each day, and if time is off by a little here and there I don't worry about it) I just hit the button, place under my tongue and wait the 3 minutes for it to beep that its done. My kids know I am not miving till its done! Then I put reading in my iphone FF app (i never even look at FF on line!). Thats it. I like having a reason to lay there for a few more mins snug in my bed! I usually sleep great so thats not a problem for me, and if I've gotten up to go to the bathroom or something like 4am or something and I get up at 7am it never has effected the reading. I take the temp usually around 7am or thereabout. Hope that helps!