Question on organizing photos in an album

This may be perceived as a silly question but whats the best way to arrange photos in an album or on a website? I usually shoot B&W but depending on the photo I may enhance it, use color, sepia, etc. Is it best to keep B&W separate or is it better to arrange based on the location the image was taken? For example have one album for my new york photos and one for photos from my european trips. Also is it best to keep iphone photos in their own album?