I've been doing it since about 2001(DVDs and laserdiscs). I do it so I can see where I left off on a certain tv series or its interesting too see how long its been since last viewing a certain movie.

Yep. Or keep track of what I haven't watched but I guess that's the same thing.

Yup. In my spreadsheet of dvds on Google Docs, I have a column for date watched. That's one of the things I miss most about DVD Spot...it was so freaking easy to keep track of these things. Now, it's kind of a pain in the ass.

Just in my head.

I have DVD profiler, so it's very easy to do so. Can even sort by last watched.

just here on DVDTalk. in my sig 2009 Film List, weekly diary.

Yes, I've been keeping an excel spreadsheet since Jan 2002.

Yep, in a spreadsheet generated by DVD Profiler.

I keep track of what I watch now on Microsoft Word, and I just do it by the weeks like on here

Yes, in an Access database. It only goes back about 2 years though.

My stuff is arranged on my shelves by what I've actually watched- the stuff that I've watched completely goes first, then the stuff I've watched but haven't 'finished' (it's too late at night to explain what I mean by that and you'd think I was nuts if I told you- if you really wanna know look up a post I made on the subject a few years ago and then marvel at all the "WTF?" responses) and after that is stuff that hasn't been played at all.

After I consider a disc "finished", I don't keep track of when it gets played after that- could be never, or could be every day. Not surprisingly the music discs get the most replay, though I usually skip to my favorite songs.

Same here. I more or less can remember what I have and have not seen. This summer I actually caught up on A LOT of stuff I hadn't gotten around to watching, so that was a nice change of pace.

Used to track it in DVDSpot, plan to track it whenever I get around to converting that to a GoogleDoc.

I also try to vote on films I've seen in IMDB, so that sometimes helps me remember that I've already watched it.

I don't track the specific date I watch anything, but I do know which of my specific DVDs I haven't watched yet (regardless of whether or not I've seen it before -- such as renting it from Netflix).

Not really. Except for the Annual Horror Challenge.
Which is fantastic.

As are the annual Sci-Fi challenge, Academy Awards Challenge, and Holiday Challenge!

No, but I really should. I'll go weeks between episodes on TV shows. Case in point:last night I went to watch Smallville and it had been well over a month since I last watched an ep, so I had to figure out where to pick back up at.

I have a list of DVDs that I recently purchased, so I know which ones I want to watch, to make sure that they're not defective. I don't buy a lot of DVDs, so it's usually pretty manageable.

it's all in my head. I have a good memory for that.

Nope.

I usually just add as I go on the forum here under the rank em thread. The spending tab can get a little scary though!

I use DVD Profiler "Last Watched" feature. The problem with that is when you watch a disc again, it removes the last instance of when it was watched from the list. So I use the notes feature to also add a date I watched a disc. I post reviews of each disc I've watched, so those without reviews can also be flagged as not-watched.

Not really. but everythign gets watche dbefore it gets filed in teh colelction. So if it is sitting on my sehfl somewhere, I have watched it. If it is in the pile on the floor, I havent watched it yet.

I do it the old-fashioned way. I keep a journal in a composition notebook. With a Bic pen. I put down the date and then what I watched on that date, with as much info as I feel like including. Sometimes with comments, sometimes not.

For TV sets, I have a post-it inside indicating what's the next episode to be watched.