Playing short stacked on the bubble

[Hashiell_Dammett]

I need some help/advice/tips for playing short stacked when you're deep into a tourney.

Are there any guidelines for the hand you pick to run with?
Or is it all just a matter of having to get lucky and outdraw a better hand so you might as well pick any random hand?
At what point do you just give in and just run with any two cards no matter what they are?

Here's an example from a recent tourney where I was unfortunate enough to be in this situation:

Live 20 player NL HE $22+3
Down to 7 - pays to 5
One guy has about $9K
4 players are hovering around $2500
One guy has $500
I have $725.
Blinds are 150/300
10 minutes before blinds move to 150/300 w/ $25 ante

At this point, I'll try to double up with any pair, any ace, any 2 cards 9 or higher any suited queen or higher, any suited connecters 89 and up and even some one gappers if there is no raise in front of me.
Are these unreasonable requirements for my situation?

In the BB I get Qc 6s
Amazingly, everyone folds to the SB who is notorious for ultra aggressive overbetting.
But then he just limped in and I got suspicious.
I check
The flop comes: 4d 5d Ts
He puts me all-in
He's either got an overpair or a garbage hand that just caught some piece of a garbage flop.
I fold.
Is that a weak fold?
Should I have gone in preflop with my garbage at that point?