In Germany ( where I am right now enjoying the post World Cup mellowness ):

Preferably only snack on wurst that was made on the premises. The taste is quite amazing.

Keep away from the fish if not in a coastal town. If the cook is from Northern Africa you might give a cautious try.

Beer gardens are little spots of heaven on earth. Especially if you can get wine instead.

If any restaurant has turkey breast salad on the menu, just find an excuse to leave.

German wine can be good but Austrian great.

Last but not least: Ask if they take credit cards. Most do not.