Many already covered. Here are a couple, perhaps already partly covered, but with my thoughts added on them.
Time. During disruption some newer drivers, drivers on driver only operation (DOO) services where time is their responsibility to check, or drivers of guarded trains but who were previously Guards themselves where checking the time is obviously something they had to do a lot previously, can all get caught up in feeling the need to change ends or getting to the front of their train as quickly as possible to reduce the delay.
A common one is at a busy terminus, you may have a train of up to 12 carriages in length. As you start walking up, platform staff spot you and press the Train Ready To Start (TRTS) button to inform the signaller the train is crewed and ready to depart. You may now only just be at the front and getting in the cab, or sometimes only half way up the platform(!), when the starting signal changes to a proceed aspect.
Risks here can range from the Guard on a guarded train now closing the doors and giving you the ready to start bell buzzer code causing you to head off having forgotten to do something simple like setting the headlights or radio up, to the driver of a DOO train closing the doors before they’ve had the ‘Close Doors’ come up on the CD/RA (close doors/right away) indicator.
At a station without dispatch staff, the driver of a DOO train running late could easily set the cab up, look at the time, close the doors and off they go… through a red signal as the route hadn’t yet been set, as they’ve focused on the time and dispatch. Similar incidents have occurred on guarded trains too, where both crew have got on the move as soon as possible due to a delay.
While it feels unnatural at first, ignoring time and any temptation to rush due to any of these factors happening around you is a key ‘skill’. Even if you’ve got a dispatcher giving you the CD/RA indications or a Guard giving you the ready to start bell buzzer code, ignore all these things until you have methodically worked though the cab set up procedure, checked everything and got yourself comfortable.
In a similar vein, the toilet! don’t be tempted to miss an opportunity to use the loo when changing ends on a delayed train. You might think “It’s only a 45 min journey, I can hold it”. Even if the journey goes well, it can soon become uncomfortable starting to get a bit more desperate while trying to focus on driving. Even worse if said disruption that caused the late arrival of the inbound journey holds you up and extends that short 45 minute journey! Better to delay it an extra minute or two than potentially have yourself a completely avoidable incident and kick yourself for not just answering the call of nature!