A is for adjectives and adverbs when a stronger noun or verb will do.
B is for bullying book reviewers when they don't like your book.
C is for calling an agent that clearly wants you to email or snail mail.
D is for distracting yourself from writing by writing a blogpost ;)
E is for excessive use of semi-colons.
F is for forgetting to run spellcheck.
G is for groaning over how unfair the Industry is.
H is for head-hopping.
I is for ignoring writers' guidelines.
J is for juggling too many projects.
K is for kindness to your characters.
L is for listening to bad advice
M is for making people believe you're something you're not.
N is for not doing research
O is for opening with a dream sequence every time.
P is for putting down other writers.
Q is for quitting.
R is for run-on sentences.
S is for sending that manuscript off before it's ready.
T is for talking when you should be listening.
U is for under-use of narrative (we don't want to read all dialogue!)
V is for venting in public.
W is for worrying.
X is for xenophobia.
Y is saying Yes when you really want to say No.
Z is for zookeeping, the career you might have gone with, if not for this writing business.