I shared a sliding panel as a plugin for WordPress in the Plugin Directory and it was downloaded more than 500 times in only 4 days whereas my 2 past shared plugins didn’t pass 150 downloads in about 1 month http://wordpress.org/extend/plugins/profile/fay-1
I know I know, it’s very very far from the most downloaded plugin ever for WordPress… but how to find a new plugin idea that will rock when you come very late to this field where almost all needs are already coded in existing and mature plugins ?
1- When you have the choice, make plugins for the frontend part of WordPress and not the backend
3- Chose an official-like name, something like WP PLUGIN FUNCTION (and not .fay PLUGIN FUNCTION :) )
4- Frequently commit (real) little updates (every update ≅ last downloads * 2 :) )
5- Write plugins that interact with extra web services (Google products, Facebook, Twitter…)