After redundancy I basically messed about for 3 or 4 months, but did get bored eventually. Then did a few months of voluntary work 2.5 days a week at a bike recycling/events organisation – whilst still spending lots of time riding my bikes, painting, gaming and whatever.
After 8 months I decided to go back to university to do a PG degree, but did a few months agency work before the course started. Now almost three years on from redundancy, and having just completed my course I have got a proper job again – albeit 4 days a week.
A couple of days a week voluntary work doing something you enjoy is a good way of using your time. I also really enjoyed going back to University, although it’s not a cheap exercise.
BTW state pension eligibility is now 30 years of NI but pensions rules may well change …
[list]https://www.gov.uk/state-pension/eligibility[/list]