Looking for some advice on location of first shop

[wizardboy43]

I live in Edinburgh and so the obvious location to site my first shop would be the place I know best Edinburgh, the first thing I have found out is that per head of population Edinburgh has the most coffee shops in Europe and that includes London, should I look further a field, there certainly does seem to be a shop on every corner.

I have been in the Hotel trade in the past running my hotel but this is certainly different and need to know what things I should look for when choosing the coffee shop location.
Any help would be greatly appreciated