Exploring the Number 11
November is the 11th month - so anything related to November (food, weather, holidays, whatever)
11 = parallel lines = railroad tracks, roads, buildings, trees, fences, guitar strings - they are everywhere!
An 11-sided polygon is called a hendecagon - the Susan B Anthony dollar has a hendecagonal outline along the inside of its edges.
11 is the atomic number of the element sodium. Salt is a mixture of sodium and chloride, but still relates to the theme - 11.
Apollo 11
Eleven pipers piping is the gift on the 11th day of Christmas
The Major 11th chord - (Music...guitar, piano)
11 players on soccer/cricket/field hockey team
11 players on field at a time for an American football team.
Maple leaf on the Flag of Canada has 11 points.
The eleventh hour means the last possible moment to take care of something/late in the day. So, something left until the last possible minute. Someone rushing about...fast shopping, hurrying, moving with purpose etc..
Cards/Blackjack - A & Face card
Dice/craps - 7 or 11, called a natural..so dice showing 11...even just rolling dice.
11th sign of the zodiac - Aquarius water bearer...jugs of water, bottles of water.
Veterans Day
11th the letter of the alphabet - K
1th letter of the Greek alphabet - Lambda
11 objects/subjects...11 of anything.
Street signs (11th street, etc.)
Road signs (Exit 11, etc..)
Dewey Decimal - 011 is Bibliographies and catalogs
The "11 o'clock number" is a theatrical term for a song that takes place late in the second act. Usually something memorable. - So, someone singing on stage in a play? Or a child singing at home because it feels good - if it was a show stopper or just plain adorable - it counts. 
11 candles on a birthday cake
11th year wedding anniversary - steel (traditional) fashion jewelry (modern)
Just in case people were looking for ideas. There's still plenty of time and lots of things to do with the number 11.
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and Xi is the 14th letter of the Greek alphabet, so 11 = 14.
11 in binary is 1011, but 1011 decimal divided by 3 is 337 which is 30 x 11 + 7 (7 being half of 14) thus proving that everything in the universe is connected.
Bonus fact: 337 decimal is 223 octal, which in decimal is 20 x 11 + 3. Isn't math amazing?
