Commentary driving is a great tool for improving your early planning and anticipation methods.
It is literally a case of saying what you see.
Talking out loud about what it is you are seeing will allow you to react and plan early based on what is considered the biggest hazard ahead of you.

Are there traffic lights coming up?
Is it that the car 6 cars ahead of you is braking?
Is it there is a roundabout coming up?
What is the bus at the bus stop just about to do?
Are those pedestrians just about to cross the road?
Is that cyclist going to carry on ahead or pull out in front of me?
Are those children going to run into the road to get their ball?


Any or all of these things as well as hundreds of others can make you drive just slightly differently to deal with the situation if you've seen it coming up, but if you don't look further ahead in the road you will miss it or not be able to plan early enough to be able to deal with it.