Don't just raise or fold, limping in position and flat calling OOP are very useful actions in short stack heads up play.
There is no real shortcut, there is a lot more to this part of the game than anyone really ever understood.
I've been a heads up sit and go player since 2007, and until maybe 2010 at the earliest, many people in our game (myself included) wrongfully assumed short stack areas had low edge.
It does have lower edge, but it plays out so fast that if you add up all the short stack heads up situations that you're ever in for 6 max, 9 man or turbo speed HU games, you'll quickly realize that even small improvements will make you a lot more money fast.
Like anything, you need to study good material for this portion of the game. You don't want to learn heads up play from a primary 6-9 man player, you want to learn from a heads up specialist. Just like I wouldn't want to learn MTTs from a primary HU player, even if they happen to do well overall in MTTs, they are not the specialist/expert.
There's a ton of good free material, videos, forums like these, etc. to help you improve, it's just a matter of putting in the time towards getting better heads up.