I think the best way to prep for the bottleneck is to recognize two realities.
(1) We don't know how the bottleneck will actually go down. We don't even know what will create the bottleneck....nuclear war? climate change? peak oil? Donald Trump? Zombies? We just don't know.
SO---We all make personal decisions about what we think we will happen and what we can do to prep for it.....these decisions lead some people to live off the grid, or build a doomsday bunker, or invest in solar cells and plant a garden.....but we don't really know what the best way to prepare might be. IMHO this means we should share our thoughts and ideas and plans, but getting on a high horse about how great your personal plan is and how dumb other people's plans are is just an ego trip and a waste of time.
(2) IMHO it is also very important to enjoy the heck out of your life now. For many people, a fear of peak oil or some other dystopian future leads them to cut corners and deprive themselves of a good life now. IMHO that is a bad idea. Its like people who save money for retirement and never have any fun.
A balanced approach requires both planning for the future AND living well for the present. A balanced life requires both.
Cheers!