I found sketching on browser outlines from https://www.interfacesketch.com/ particularly useful when working with clients as it helps focus their minds on features - particularly on smaller screens as they often have little concept of how tight space can be.
Whatever is lying around mostly.
I found sketching on browser outlines from https://www.interfacesketch.com/ particularly useful when working with clients as it helps focus their minds on features - particularly on smaller screens as they often have little concept of how tight space can be.