The atomic number of titanium.
The number of letters in the Hebrew alphabet.
In the Kabbala, the number of paths between the sephiroth.
The number of yards in a chain. A cricket pitch is 22 yards in length.
The narrowest f-stop available in most single-lens reflex cameras.
The number of cards in the Major Arcana of a tarot deck, if you include the fool.
The number of players in a rugby union squad for international and other top-level matches. Seven of the players are "on the bench", ready to play as replacements or substitutes.
- from http://www.fact-index.com/t/tw/twenty_two_1.html

On my way to work, I pass a business called Wall to Wall Airconditioning. They have a big sign out the front with a logo which looks like this: W2W.

The letter "W" is of course not really a "double-u" at all, but a "double-V", and as V is the 22nd letter of the alphabet, I always think of it therefore as a "double-22".

So "W2W", to me, reads 22-2-22.

Directly across the road from this sign is a bus-stop. The number of the bus-stop is, you guessed it: 22.

Last week at work, we reached Purchase Order #2222. It was one of mine, so was presented to me to sign before submitting to our supplier. I wondered as I opened the folder how it was going to produce the inevitable 22. There were two items ordered. The first one was ordered in a quantity of 20. The second item was ordered in quantity 2. So there was the 22, the total number of items ordered on our order 2222.