With rightsizing, the goals is to make better use of the space that you currently have, or perhaps a move is in order to find a space that better fits your desired lifestyle.
Everyone is different - what might be the right size for you may feel too large or small for someone else. So, before starting add, subtract, or move things around, it's important to take a look at what your current space looks like now.
A recent article on Airtasker.com's blog has a short list of questions that help to assess your current space. Walk through your current home and ask the following:
For more about how to assess your current space for rightsizing, please see this article from AirTasker.