On the 145,
Take your time after takeoff and wait to shut down the Apu until after the Apu bleed is actually closed. Check the Apu bleed button that the OPEN inscription is extinguished. Going too fast has often led to Apu Bleed Fail and Apu Fail caution messages, which leads to an unnecessary write up in the maintenance log. Seen it too many times. Mx will often times just MEL it instead of diagnosing it. Then you get a plane with no apu for a couple of days...
Also, note if there is adequate airflow from the vents. There is no indication of recirculation fan failure other than poor airflow. If the airflow with both packs on is poor, write it up! We were not trained to recognize this and it often goes unnoticed as a problem.