Top Lane - Deep ward enemy jungle, maybe counter jungle a bit (or a lot). Top lane is very isolated and the area around it has the fewest players at any given point of the game.
Mid Lane - Take any and all vision denial you have and clear out the area if you really want to gank mid. Otherwise, if top or bot are much easier to gank, join the midlaner and shove their lane, then both of you leave to the other lane that's apparently easier to gank. Be sure to warn the mid laner ahead of time or they will just think you are stealing CS.
Bot Lane - If you have an engage based support
and you can trust the player not to waste your time, just go ahead and wait. Alternatively, deep ward the enemy jungle, shove the lane, and either bait or take dragon.