User blog comment:GimmeStarfoxWii/Help this noob ward/@comment-9713132-20130423110611

Two normal wards for chokepoints and one Vision Ward for an objective is what I usually take, alongside Sightstone / Ruby Sightstone.

Note that you aren't and shouldn't be the only one with wards - because you babysit the ADC even out of laning phase you can't or at least aren't meant to go over the entire map. Mid and top should at least be responsible for covering top river and jungle, while jungler should basically have a free ward to cover whatever's missing.