Do you have a list of the cars you like? If not, make one and then go from there or the choice is just too great.
Once you have a list you can make appointments at the local dealers to test drive the cars you like.
It is important to try and test drive the actual model of the car you are considering ordering as the specs are different on each range. Some dealers have high spec demonstrators that could well have things on it that a base model will not have.