Just before you reach the side street you must turn your head to the left to make sure no-one is coming out in front of you, the same applies to the right. This is also known as defensive driving tips, eg. being ready for the unexpected. Anything can happen and usually does if you are not prepared.
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One of the most common fail items on a RTA test is NOT checking over the shoulder before changing your position on the road. I have a simple method, which has worked well for the last ten years, its called MISM. You make the initial decision to move by the Mirrors, then Indicate to show your intentions, check over your Shoulder to see if the blind spot is empty or not, and if it is empty, then quickly move over. When the driver looks over the right shoulder into the middle of the backside window he/she is looking into the middle of the blind spot.

I tell my students whenever you move the car more than a metre to the left or right you do a MISM, and if you do you won’t hit them. The word MISM is a memory prompt for the student and saves time for the instructor, this has worked for every student in the past. After the student has been trained to do this three or four times, it becomes second nature.