Where can I reduce clutter

Where can you reduce clutter in your life?

This is a very pertinent question because I am currently decluttering my place ready  for me to move in the not too distant future.  I have been a hoarder and kept every gift and greeting card given to me over the past 30 years.  I have donated a lot to the Salvos shop and given a lot to friends and family.   The main thing I now hoard are books 📚 and photos 📸 but I want to keep most of them and get rid of a lot of stuff in have accumulated.