I've been thinking of a way to help new users write better entries, by which I mean, to discourage them from writing entries about "memes" they created themselves or that they've seen their facebook friends using.
On the Add an Entry page, there is a guideline in the right-hand sidebar of the site that outlines some tips for making a good entry. What I'd like to see is this sidebar moved to a full-page guideline, maybe on an intermediate page between the main Memes page and the Add an Entry page. I think it should clearly and specifically says things like "DO NOT add memes you created yourself," and anything else that would help prevent new users from making entries like this and this.
I think that what the sidebar currently says is great, for the most part, but people tend to ignore sidebars. I would also group all the DO NOTs towards the top just to make them stand out a bit more.
Anyways, that's just my two cents on the issue.