I take really good care of my media discs. I prefer the Optical format better then Digital Download (say Itunes) for media. BTW, I really have a big collection of CDs, DVDs, and DS Games for almost 20yrs. Before Disc there was cassette tapes and VHS Tapes back in the day of good ol' 1980s-1999. Then 2000 is the launch of Discs format wars. So yeah, even LaserDisk I never owned, but was harder to handle it looks, because it was twice as big as a DVD and the RECORDS back before CDs where about same size as LaserDisks for music. So yeah, people took care of them. I keep all of my cases, and artwork, etc. 80% of my movies and music I own is not available or OUT OF PRINT online.. I take care of Blu-Ray Discs the same way as any other formatted Disc title! So there ya go!
When I handle discs I use my pointer for the middle and the thumb for the outer part of the disk. Been doing for yrs. To clean them one of my tips which works is BABY WIPES... Been using them for a long time and works. I just wipe the discs with baby wipes then wash with water in the sink and dry them off. So I do keep them clean. Better then the toothpaste trick many people post rummors about... I also store them in my bookshelf...same goes for my Video Games. I store all of my Nintendo DS games in their cases after play.