Here are some useful links with some medic and/or writing information:
How to Write Marginally Readable Fanfiction:
Page covering all the basics about writing fanfic and several grammar hints and clarifcations.
How To Write Better Fan Fiction:
Long page with lots of hints for fan fiction writing, formatting tips, punctuation, characters hints, adding comic relief and many very useful lists: list of beats, ways to show common emotions, ordered activity level, ways to show common actions and different sounds.
Fic Kit: Fanfic and Fanwriting Resources:
A page full of very useful resources links. Medical, military, writing, formatting, characterization, techniques, science, sex, and even a calculation of SG1's salary. Stargate especific links.
Deep Background:
Place with some information about critical care, vital signs, common fic injuries, tubes, drugs, hospitals and first hand account of cracked ribs made for X-Files writers, but can be used by any fic writer.
The Cascade Hospital:
Site for fan fiction writers with simple explanations of several common fanfic injuries and conditions divided by sectors of a hospital with name of condition, description, symptoms and treatment.
Mayo Clinic:
Website with a lot of medical information of many conditions and symptoms.
Wilderness Survival:
Website about survival in many different environments with a lot of information. Pick an environment, create a planet for it and whump your characters according to suggested dangers. *evil grin*
Research Outdoorsmanship:
Website with some information about field trips, dangers and gear to take in an outdoors travel.
Pain Map:
A huge list of many different kinds of pain.