You mentioned travel - what's the longest stretch of time you have travelled for? I went backpacking for two years at 35 and it was the best thing I ever did for myself; the chance to just 'be' without any pressure on your time, the freedom to go and do whatever you like with whomever you like - it was wonderful therapy for me, and I came back recharged and ready for the next phase of life.

If you haven't ever had a very long travel holiday, consider it.

edit: if you want to make friends, I recommend SCUBA diving - I've never met a more welcoming, inclusive community of people