That really depends on each persons preference, and what they are comfortable with doing in a sexual manner. There are many books, instructional manuals, a variety of information, and dvd's you can research if you google or use your search bar regarding sexual preferences and positions ~ there's a lot of information out there...
Good Luck :)
Even in missionary position, if you touch her shoulder with your opposite shoulder, she would get clitoral stimulation. If is up on you she can adjust,her clitoris in such a way that she gets extreme pleasure. Both of you learn kegel exercise. If you kegel each other, movement of your penis will be vertical and this will give her different sensation. Similarly if she kegels , she grips your penis more strongly with her vaginal walls.Yes, you will find many techniques in websites or sex manuals as suggested by the above poster.