Most bios run between 50 and 400 words, with the average length about 150 words. Double space your bio and try to it no one more than one page in length.
When you write your biography, do so in the third person. You should use present tense, unless a past tense is absolutely necessary.
Depending on what manuscript the bio is for, include any qualifications, education, skills, or experience you may have helps makes you look professional. Do not include unimportant information.
Most of your bio should be devoted to your writing achievements. Previous publications, writing awards, or degrees you have relating to your work's subject should be in the bio. If you have real life experience in your subject, be sure to also include it.
If you are lucky enough to have been interviewed by a known publication, or have had a radio or television interview, mention that in your bio.
This should compliment your piece. If you have written a free and modern story, then make your bio the same way. Do not have a silly bio with a serious writing article.
Always present your information in a positive way. If you do not have a lot of work published, do not fret. Post what you have in an upbeat manner. Even if you have not been published before, you still have talents and qualifications - use them.
Do not make your bio seem too good to be true by over exaggerated information. Making yourself sound better than you are can, and will, backfire in the long run.
Do not lie. It will only make you look like an amateur, and could cost you future sales. Aim your bio at the editor who is publishing your work. List only publication credits that will impress them.
Here's the bio I've been working on: (It's still a WIP)
Clarissa Draper is a Canadian writer currently living in Mexico. Although trained in book layout and design, she prefers to spend her time planning and writing her code-based mysteries. Two of her short stories have been published in anthologies. She started writing full time in 2006, and is currently writing her third mystery in the Evans/Blackwell series.
Visit her at www.clarissadraper.com
Have any suggestions for my bio? I'd be happy to hear them!