Well, first you'd have to play the game. As in, this question can only be answered once SOMEONE has beaten it, which no one has, as it's not out yet.
Well, although nobody knows for certain, this is how it was speculated on the community forum:
1. Build a good relationship with your crew, so their loyalty will inspire them to come and rescue you.
2. Upgrade and maintain the Normandy to the highest standard, thereby giving the ship maximum survivability and the equipment necessary to effect a rescue after it's destroyed.