My solution:
Shoot less .45ACP.
Shoot more .22LR since I have more of it than .45ACP.
Keep as few of calibers around as possible, so when I get my XDs and my 10/22, they can use my ammo supply.
Collect brass of .45ACP and sell it or trade it for more ammo. (my brass is fired once since I don't reload, and thus anyone who gets it from me knows that. Evad and OldmanFSCA have dibs on first pick when I have it for trade/sale.)
Buy both calibers of ammo when and where I can when prices are reasonable again. At this rate, I'll probably put 400-1,000 rounds through my XDm/XDs for the entire year.
If anyone needs IT work, I'll geek for ammo

There was a shortage before Sandy Hook and it only got worse after due to FUD and Fudds. Unlike many people, I don't buy because I need to (due to personal shortage), or because I'm desperate; I buy because I want to. I can afford to sit back and wait for prices to come down or to find things to trade. Desperation is expensive. After all, look at the people who are desperate and pawn things off for pennies when they paid dollars for an item, or people who need payday loans, etc. A lot of people live beyond their means, which is a sad choice..and other times, things happen and they don't have enough money, ammo, whatever it is, set aside. It's always best to prepare the best that you can. No one could have predicted Sandy Hook, but I don't think anyone is foolish enough to believe that such things won't ever happen again and when they do, things regarding ammo, firearms, and proposed laws will be as they are now. It's happened before and it will happen again.
Was it lack of funds or insight that keeps some people from preparing for our current situation before it happened? We've seen the trend before (event > panic buying/scarcity/high prices > proposed laws > FUD > action/inaction on laws > prices reduced > ammo/gun/supply and demand return to normal > lull until the next event > was, rinse and repeat)....and we know it will happen again, so why the unpreparedness by so many people?