Are you on any local yahoo groups, doesn't necessarily have to be a dog group...but you could ask them. Word of mouth is the best way to find a good vet. If people will recommend a vet specifically, that means that they generally have a good reputation.
I always say go and "interview" the vet before going in...they are in fact working for you so you better approve of them. They should be happy to give you a tour and ten minutes of their time for no charge, if not...walk away. If at any time you feel any uneasiness around the vet or staff, find a new one. You should be able to feel comfortable no matter what, considering I think that it is important to have a good relationship with your vet.
There are plenty out there, and we all have differences in what we expect from them. I expect to be on a first name basis, and know their personal home phone number just in case. Others just want a vet close by in case of an emergency and that is it. So a lot of what to look for depends on what you want...
Make sure you know if they offer after hour care, not necessarily if they are emergency (unless that is a must) but if they are willing and ABLE/WILLING to stay after hours in case if needed.
Do they offer surgery, x-ray, ultrasound, internal medicine, acupuncture, raw friendly, holistic care, traditional medicine, etc. There are so many things to think about when picking a vet.
BUT most importantly, pick a vet that your DOG feels comfortable with. If your dog is scared of the vet (unless your dog is afraid of everyone) consider finding a new one. It is so much easier to work with animals that are comfortable and happy to be around us rather than a scared and anxious dog. Some dogs don't like men that much so a female vet would be best for example. I also think that the vet should be able to get down on the floor with them and even play if possible.
I could go on and on, but I hope this helps LOL! Good luck!