What do you think is the best way to prevent unwanted pregnancies, STD's and other venereal diseases?

Apparently people still are unaware of the advancements made my technology to help with these things. I'd say the best way to prevent unwanted pregnancies and STD's number one is to decrease the amount of partners you have down to one. Then use a combination of birth control along with condoms and always make it a priority to have good hygiene.