There are a few things you can do to optimise your heat pump for winter. Cleaning the filters is VERY important to allow airflow through your system. Open the front cover and vacuum out the dust in the filter. If the airflow is restricted through the filter your heating performance drops dramatically!
Make sure all winter you are set on HEAT mode, not AUTO. Set a temperature preference – this number is a comfort meter not an exact temperature target for the system (higher for warmer and lower for cooler). Fan speed is also very important – the higher the fan speed the warmer it will get and the faster it heats up.
Just like you, heat pumps need time to get going in the morning. Use your timers to set your system to come on 1 hour before you want the room warm. With most heat pumps, if you see the power light flashing in colder temperatures, your system will be in defrost mode. Wait for 10-15 minutes and it should start to heat again.