[jb9]

Be more careful when an A flops and you can't beat a pair of Aces. Don't automatically give up with KK or QQ when an A flops (I would still bet the flop), but try not to put in multiple bets on every street when you know your opponents will play "any ace". If the action and your read convinces you your opponent has a pair of aces, you are drawing to 2 outs and should play accordingly.

Don't worry about losing with AK to A3. It happens, but whenever they flop 2 pair, if the board pairs higher than 3 or you get the K you can still win. This will work out for you in the long run.

Don't let it put you on tilt when someone who started with a weaker hand ends up winning. This compounds the problem (i.e., you lost the hand and now you are upset and no longer playing your best).