Here's Neil Gaiman with wisdom:
The main rule of writing is that if you do it with enough assurance and confidence, you're allowed to do whatever you like. (That may be a rule for life as well as for writing. But it's definitely true for writing.) So write your story as it needs to be written. Write it honestly, and tell it as best you can. I'm not sure that there are any other rules. Not ones that matter.
The funny, from Will Self:
Regard yourself as a small corporation of one. Take yourself off on team-building exercises (long walks). Hold a Christmas party every year at which you stand in the corner of your writing room, shouting very loudly to yourself while drinking a bottle of white wine. Then masturbate under the desk. The following day you will feel a deep and cohering sense of embarrassment.
And the nutty, from Colm Tóibín
8 On Saturdays, you can watch an old Bergman film, preferably Persona or Autumn Sonata.Read the whole thing.
9 No going to London.
10 No going anywhere else either.
Thanks to Laurie Thompson for the link.