I posted something like this elsewhere, but I think the signs of a good bike shop are: Did they treat you with respect? Did they listen to you? Did they try to find the right product to meet your needs? Did they do more than a cursory fitting when purchasing a new bike? When doing repairs, did they finish the repair within the time they told you and at the amount they quoted? Was the work quality work?

If the answer is Yes to these question, you've found a great shop and you should shop with them whenever possible and do not try to nickel and dime them.

Products I like or have promoted:
Polar Water Bottles
Campagnolo Components
SKS Race Blade Fenders
Surly, Bianchi, and Redline Bikes
Most steel lugged Italian racing bikes
Bakfiets cargo bikes
Xtracycle upgrade kits
Dutch style/English Roadster style bikes
Wheelbuilder Areo Disk covers (tri and TT use only)
Neuvations racing wheels