Know that it is perfectly okay to create a male OC and not a female one (even for straight romances.)
There's a serious lack of River Song, Martha Jones and Donna Noble fanfics. No one cares about how you fell in love with Ten. Tell us more about women that fascinate us.
Changing the canon genre is just wrong. For example, Harry Potter can't be science-fiction and Sherlock can't be fantasy.
Yay fanpoetry!
Don't use raising children as a plot. You're a sixteen-year-old writing fanfiction; you don't know squat about having/raising kids. (No offence intended to sixteen-year-olds who are/have been pregnant.)
YOU ARE READING
Tips For Writing Fanfiction
RandomExactly what the title says. (If you have questions, you can PM me. I'll try to help. Or, you know, take any insults you want to throw at me.)
