So if there're any admins or developers for CodeForces out here — I've got an idea:
What if you guys would implement a system of quick contests 1v1, 2v2... The key idea is that everybody will be able to create a quick contest in a particular area to have a quick competition with his friend(s) to enhance their skill or just have some fun. Problems will be randomly chosen from an archive (as of now) and one will be able to set their amount.
I think this idea has a lot of potential since it hasn't been made anywhere yet. This can be a way to widen our relatively small CP community and throughout the time other mechanisms can be created based on this existing one.