Today's discard target is the mysterious collection of aged condiments in your fridge.
Grab yourself a trash bag and start weeding the safe from the dubious, the known from the unknown & frankly frightening.
Here's a handy list of how long foods can be safely stored for.
Once you've eliminated the bad and the things you know you won't eat before their "toss by" date, take a laundry marker (a.k.a. a Sharpie) and write on all the condiment bottles – over the barcode for example – one of two things:
– a greater than sign and today's date to indicate this is definitely older than today
e.g. ">20060319"
– when it should be tossed according to safe food storage
e.g. "toss June 06"
Next time you decide to do a fridge purge you'll be more accurate in throwing away those things which may be a danger to your health.
Discardia 
I have this posted on my fridge as a reminder as well. (see here: http://www.backtable.org/~blade/fnord/condiments.html)
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