Look first before you do anything.
Try to keep a few steps or more ahead of the aircraft.
Strive to fly within tolerances (Regs, SOPs etc)
Don't to get to fixated on the little things. Think of the bigger picture.
Try to avoid flying through big tall puffy clouds.
Make sure you are carrying sufficient fuel.
Be prepared for something to go wrong.
Communicate effectively.
If in doubt, don't be afraid ask again!