Second thing to do is 'Research'. We also have a bookstore with thousands of books on breeds of dog that state characteristics, grooming needs, etc. on each breed. You might consider attending some dog events in your area - to see first hand some of the different breeds and personalities. Now take all this information and read and learn and try to come to a decision of 4 or 5 breeds that suit all your needs, desires and lifestyle. Talk of the 4 or 5 breeds you've narrowed it down too and the list you have made.
Every breeder is different, with different views, ideas, methods, practices, etc.
You need to feel totally comfortable with the person you acquire your pup from because they will be your help line in the future. No need to deal with someone that doesn't give you any answers or seems to hide certain things from you. This should be a common sense and responsible decision and not one that tugs on your heart or guilt complex. Dogs are not items in a Supermarket where you wander down an aisle, pick up what ever is on sale and pay for it at the checkout and perhaps return it later if it is not what you expected. Dogs are living, breathing creatures with intelligence, feelings, and a need to feel love and compassion.