I have a handfull of cheap digital kitchen timers. I pre-program each one for a seperate step. 1st for dev, 2nd for stop, 3rd for fix and have them lined up where I can find them in the dark. I have half dozen so I can use extras for additional steps if needed. I get mine here in the States at the Dollar Tree for(you guessed it) a dollar each. When the battery dies its cheaper to toss the timer and buy a new one.
I like AnscoJohn's idea, especially for you new guys. Tape record the times as well as telling yourself which procedure you're doing, which is coming up, and what to do to prepare for it. This in conjunction with a written procedure list could be foolproof.