Recently a started a new habit: I take a train in the mornings to get to the office to work. The train comes at every half an hour, which means I don't want to miss it. To be on the safe side, I had to come up with a solution. The route to the train station is well predictable, it just a few minutes on foot. Trains usually, don't come early so the only variable left is the waiting time on the elevator. After all, the minimum and maximum time to get to the station is within narrow boundaries.
I decided that some sort of a reminder could help to remind to get going on time. To create a reminder to leave, the simplest and easiest solution is to set an alarm exactly 10 minutes before the train usually arrives to the station. However, I am not a fan of the solution as if the alarm goes off, I have to manually disarm it, which is an extra effort to do, when I should prepare for leaving the flat.