If you're insecure about your writing, choose your critique partners with care. Victory Crayne has written several good articles on the art of critiquing and being critiqued. There are many online groups and workshops that offer critiquing. If you aren't completely confident in your writing abilities, a bad critique group can be damaging to your self-image. See the Newsletters and Mailing Lists section for some online mailing lists that offer critiquing, as well as the Writers' Groups section.
Some writers hire book doctors or other editing services to critique their work.
I do not maintain a list of professional literary services. For a full list, please see the sections mentioned above. Before submitting material, check the website's copyright policy to see what rights you are giving away. A forum for new writers. Maintained by Sara Almes.