Routine?
Sorry, but can't resist...
The routine is between a 09.20 and 10.00am start (15mins notice), put kettle on, drink tea. Do aircraft checks. Have met / aircraft brief. Put kettle on. Carry out training / jobs as required. Put kettle on. More training / jobs as required (night). Put kettle on, slippers, n.b pipes not allowed anymore! Go to bed / jobs as required, from 22.00 (45 mins notice) Get up 07.00 ish, put kettle on, hold shift till handover, cover second standby 'till required for next days duties, repeat as required until stood down, or you take leave etc.
The real beauty of the job, like most rotary jobs, is that there is no real routine!