if you dont know any good reputable mechanics in your area, ask others at work who they recommend. if not at work, another social club (church, school, etc)
usually a recommendation is the best way to go, and take the owners manual in with you and discuss what NEEDS to be done, versus what MAY need to be done. let the mechanic know you dont have unlimited finances, and this is just a normal 100k maintenance visit.
if you can't get a recommendation, go to the HOME pagehttp://www.cartalk.com/content/mechx/ and look up by your zip code. this usually gives you some suggestions and comments based on others input.