I ran across this today, and thought it was kinda cute :

A first of all, midday
B fifth of bourbon, starting block
C fifth of scotch
D end of the world, back of my hand
E end of the line, beginning of the end
F starting friction, front
G middle of the night, starting gate
H end of the earth, top of the heap, middle of nowhere
I next of kin
J center of project
K bottom of the deck, two of a kind
L bottom of the barrel, starting line
M top of my head
N center of attention, final countdown, end run
O second in command
P bottom of the heap, the first of painters, starting point
Q at the front of the queue, top quality
R middle of the road, center of inertia
S _Last of the Mohicans_, start of something big
T top o' the morning, one's wit's end, bottom of my heart, last, central
U second guess
V center of gravity
W end of the rainbow, top of the world
X wax finish, climax
Y top of your head, center of the cyclone, early years, final extremity
Z led zeppelin