I'd go further and say that once you're committed, stick your foot down and get on with it.
There's quite a few junctions just on my semi-rural commute where you're turning onto a fast moving road (60mph limit) from a full stop stop where you can only see a few hundred yards or less of the road you're joining. People seem to recognise the danger, but a lot of drivers react to it by being overly cautious pulling out and getting up to speed which just increases the time you're in the danger zone.
edit: also, don't just turn your head, my truck instructor insisted I move my head forwards as it changes your view even more and can make things like motorbikes more obvious.
Good point. Also worth noting that move your head forward to look around front window pillars, especially when moving slowly - it is incredibly frequent when a pedestrian is approaching exactly with the speed that will hide them behind the pillars when the car is moving forward. This one I had to figure out on my own.
There's quite a few junctions just on my semi-rural commute where you're turning onto a fast moving road (60mph limit) from a full stop stop where you can only see a few hundred yards or less of the road you're joining. People seem to recognise the danger, but a lot of drivers react to it by being overly cautious pulling out and getting up to speed which just increases the time you're in the danger zone.
edit: also, don't just turn your head, my truck instructor insisted I move my head forwards as it changes your view even more and can make things like motorbikes more obvious.