Food is important and would recommend you build all your new settlements on a +7 food square if possible and it wont hurt to have a few more surrounding food squares for later when you get into sovereignty (dont have to worry bout that now but good to be aware of it).
You cant build a new settlement on dolmens or other buildings, these are resource and npc spawn areas and the system will tell you that you can not settle on them anyway.
You can however build next to them. It would be good if you built next to one/s that have a good food bonus on them, the higher the food bonus the better.
Food is important!
Food = More population or
Food = More troops/diplomats or
BOTH!
Food also means you can have higher taxes to generate more gold to purchase goods on the market!
And need food to make resources - beer, livestock and horses!
Also should look at the surrounding area you wish to place your new settlement in, what players are in the area, and if they are affiliated with an alliance, and it wouldnt hurt to learn abit of info about that alliance too! wouldnt want to end up in an area that is hostile.
Edited by STAR - 04 Jul 2011 at 03:18