Over on indiewire is a flawed (in my opinion) article about things to remember before submitting to festivals.
The bulk of the article is spot on and offers great advice. But, at the opening is something I disagree with: Master the Short film first.
This is just plain bad advice. Short films are a good technical training ground, but apart from the technical aspects they don’t teach you anything about writing or structuring a good feature. Do NOT stop making your feature to do shorts first.
That’s my opinion.
Anyway, the rest of the article is very good!