So, last night, I was playing through the campaign in the original StarCraft. In the sixth Terran mission, you have to get two Dropships, one of which contains Raynor, to a crashed ship. The problem is that between you and the ship is a shitload of Spore Colonies, it's on a cliff, and you don't have anything heavier than a Goliath. The official walkthrough said to fight my way through a Zerg-filled map to take the back route.
I said "fuck that shit".
My solution? Build 9 Engineering Bays and send them in ahead of my dropships to draw all the AA fire. Engineering Bays are slow as hell, and have no attacks, but they have 850 hit points and cost only 125 minerals. Perfect cannon fodder.