The French R
Contrary to the English r, the French r is pronounced by moving the tongue to the back of the mouth.
révolution bonjour rendez-vous
Pronouncing r the french way, will help you be understood better and not only greatly improve how you sound in French, it will help you be understood better. Sometimes when I felt I was exagerating my French 'r', my teacher still thought it sounded good however you can still overdue it.
to be continued..(old pronuncation guide)