If it's a general photo-art tutorial (not just a forum post somewhere), for the benefit of others I'll usually post the link
HERE.
If it's a thread in a forum somewhere on photo-art topic of personal interest, I'll save the URL in the appropriate folder among my Internet Explorer favorites, e.g., Watercolor, Trimoon, Mike Finn Effie, etc.
Some tutorials are available in .pdf format, such as those from Shan Canfield's
www.Shanzcan.com. I've downloaded a couple of those to my hard disk into applicable folders. I'll normally rename the file to something useful to me, e.g., sketch tutorial Shan Canfield, so related tutorials sort together within a folder.
Is this the kind of thing you meant?
~Danny~