Its a bit of a wide question, but yes, checking the details of your pension is a good place to start.
Work with actual figures to do with the forecast, and find out how much less it will be, depending on when you stop working.
Then it depends on your job. Some people retire and then go back again (because of the way their pension works). Some people retire and do 'bank' shifts / supply cover. Some people start doing another (perhaps less stressful) job. Others walk away from work altogether.
Then, depends on your family circumstances and if you have a partner and if they are still earning. It might make sense not to start drawing down your pension if you family income more than covers your outgoings for a while.
Depends on your housing - do you own your own property ? (presume so if you are asking about downsizing) Is there anything left on the mortgage?
Moving house can be expensive - will you gain enough, on the difference between current house and new - to make it worthwhile ? Or, if you are downsizing considerably, is it about lowering utility bills, Council Tax, etc ?
Definitely worth going to retirement seminars and speaking to a financial advisor.
Obviously, I don't expect you to answer these questions here, just pointing out, it is a "it depends" situation.