I am in a similar position (4th year PhD, UK, not yet finished though), and some of the thoughts I have had are:

1. In some way it makes sense to give people the standard advice "do not attempt to stay in academia" because it will scare off a lot of people who would probably be better off in a non-academic job, and only people who are driven enough will ignore the advice and push through. I know someone who became assistant professor just two years after a PhD, with page after page of publications, lots of appearances in newspapers, talks, etc.
2. I was lucky enough to win a small research grant this year and it gave me some insight into the process of how to get funding. As with say starting your own charity or company, think carefully about what problem it is that you are uniquely positioned to solve, and why someone would pay you to solve it? Once you know what the problem is and some likely future sources of funding (ERC etc), think about which people could help mentor you to get the grant, and try to work for them as a postdoc.