The people most likely to make it through any kind of collapse are ones who can organize or join a social network that functions despite the new challenges. They would willingly watch the backs of their friends and receive the same benefit from them. They would shut up and work on the projects of the group, even if they suspected a "more optimal" strategy was available.
The first people to starve or die from infections would be the individualists who think that as soon as things get tough, they have to retreat to bunkers with their guns. People with social skills, people who are easy to like, people who are good with kids, people who evoke sympathy from others, people who are hard-working, open and jovial - they would be the ones that are in the best position to benefit from the cooperation that will become necessary when things get tough.
The way I see it, the fact that we can survive without the explicit beneficence of others is probably the biggest luxury of our age. We work for money, trade money for necessities and comforts, and this works fine even in the complete absence of exchanging favors. But this kind of lifestyle is a complete anomaly in human history. Actually, even now, the majority of the Earth's people do not live this way. This kind of informal social reciprocity is what we would need to return to. We would become tribal again. On Slashdot, people are under the illusion that the individualism of late-industrial society can somehow survive its collapse. That would be a fatal mistake. The right strategy is to give up a great deal of our autonomy for the sake of being useful to others. What you're ultimately doing after you subordinate yourself to the group will probably not involve much of what you learned in your jobs and hobbies. A lot of it will involve digging, carrying, sawing, gathering and socializing. Grit and attitude are far more valuable for these necessary things than skill and knowledge. Even complete non-experts with the right work ethic will contribute a great deal to their collective group, because of the sheer amount of extra work that will be necessary in a post-collapse society.