It's not just food that has expiration dates. Check out these association expiration dates, so you don't learn them the hard way ....
1. Conference call dial-in numbers: Found out my "use anytime" dial in and passcodes expired when I didn't use for 6 months. Learned it when dialing in 2 minutes before everyone else. If you use the same conference call numbers all the time, find out if something makes it expire.
2. Batteries on smoke/carbon monoxide detectors: Change them as often as you'd change the ones at home.
3. Vendor contracts: Especially if you inherit contracts you didn't execute, might want to check all of them to see what makes them expire - a date, a change of ownership, an action .... (or what makes a price increase).
4. Lease agreements: If your copier or other equipment has a date where you have to notify to either purchase or a new term start - find out what that is. Your option to buy or cancel contracts might expire at a date you don't expect (i.e., well before the end of the term).
5. Certificates of Deposits: Financial institutions will alert you of maturity of a CD; along with the terms you presently have. If you allow it to roll-over it may not do it anywhere near the rate you initially had - and also may not renew at the highest rate they offer. You may have to ask to get a higher renewal interest rate. Be sure to check the maturity dates so you aren't renewed well below an interest rate amount you'd want.