What to do with leftover blank media CDs/DVDs?



As the title suggests I’ve got a chunk of leftover CDs and DVDs as I moved through the optical disk media generations (currently on BluRay).

What are some of the useful ways people have made use of their old blanks?


What types?


Mostly -R and some -RW of both CD and DVDs


Brands / manufacturers?


Mostly TY/Verbatims/TDK’s for CD-Rs and Phillips/Verbatim/TDK for DVD-Rs