Take one of those big red switches, add wifi or wired ethernet, webserver and RTC. Use rdate or openntpd or something to sync the clock. Why do all of this? Call it a “I’m running late dead-man’s switch”. Push it in the morning after your shower, or maybe while you’re making breakfast. Slept in? It’ll let your coworkers know you’ll be running late today. If you’re pretty consistant, you could even calculate an estimated time of arrival based on when you pressed it.