I say "Wake me up at 7" and "Turn off my alarm" every work night and work morning. If I'm ever timing something (like how long to let my French press steep), I say "Set a timer for x minutes."
I prefer to do it every night before going to bed. I like to feel like I'm choosing to get up at that time, as opposed to being under a pre-ordained schedule. (Which, of course, it is, but perception matters.)