How do you deal with criticism as a writer?

Criticism is a blessing to improve the writing but it must come from the genuine person or group.

The more, the merrier:)-. More riticism would get the writer in you peak-perform. It will create news, it will make you renowned. But always be polite and never indulge in personal slurs. ZDo discuss...bit never argue! 

Do not look at negative criticism as deficiencies, but seek it out  to improve  writing . Do not look to your critics  as  opponents, but as allies to improve your  productive writing.

I see Crtisism as something that helps me imporove and grow in my writing skills.

I try to deal with it accordingly. If plausible, deserved and constructive, I'll embrace it with a thankful contentment. Compared to other activities/professions, writing really is judged by the receiving audience, regardless of the genre. If hollow, unfounded and destructive, I'll be burning with passion to refute it, again accordingly, by writing about it.

I welcome it.  In fact we, as writers, are encouraged to join a Critique Group where our work is reviewed by our peers.  A critique is a two-way process.  A sensible critique is beneficial for both the writer and the peer who conducts the critique or analysis of your work.  For the writer whose work is analyzed, a critique can help him improve his skills, provide him a certain level of support, and draw confidence from knowing that his work is in the hands of professionals.  At the same time, a person who does the critique can also hone his own writing skills. 

Actually, before we submit our work for critiquing, we need to be members of a critique group.  In this group we submit ourselves to certain guidelines.  It is important for us to join such group to get an honest, impartial, and beneficial feedback about our writing.

if someone told me it's good, I don't believe it, and improve it, if someone told me it's bad i'll try my best to improve it, either way never be satisfied at ur current level, and always seek for the next one.

Acceptable when came in a good attitude manner which it will be very helpful but if it is coming in a bad attitude manner will be ignored because who wrote it driven by bad cause.

systematically, it is not surpriseful to criticize someone about your thoghts, becaluse naturally people are different with their attitude, every person has its own believes, way of thinking and understanding as well as emotions. yet crticism is always postive to writers, because in a way,  it encourages writers when they write about the reality since most of people, specially interest and specific groups don't consider about the reality, and in another way, criticism is light or toach to writers because the criticezer endeavors to show you what you have covered or missed to mention in your wrting.