2013 is already here, so it is time for the 2013 DAY PRIME!!!
The idea is simple - number the days of the year from 1 (January 1st) to 365 (December 31st). Every day of the year you should use the appropriate prime lens/lenses (focal length is the same as day number), take as many photos as you want and post them.
Don't have primes? No problem - you can use the ends of your zoom lenses!