Here are two tips, assuming that you don't want to do work yourself. It would also help us if you said "for 700 dollars they are going to do x to my car".
1. Don't buy the "30k/60k/90k packages" that dealerships and shops recommend. They are full of it and are trying to rip you off. Open up your owners manual and get the services that it recommends. Often times the dealerships are recommending services way above and beyond what the manufacturer recommends. Lots of times they package a simple oil change and trans fluid change with a 100 point inspection, fluid top off, car wash, this and that...but if you just got the oil and trans done it would be half the price. A real mechanic will do inspections for free during routine work like an oil change, usually without you even having to ask.
2. Go to a reputable independent garage instead of a chain or dealership. Tell them what you want done, and if they recommend other services ask them if it is really neccesary. Lots of times dealerships will employ high school kids to do the simple work like oil changes. Independent garages usually do such work themselves.