Another cliche that I absolutely despise is the arbitrary love-interest character. This goes for rom-coms, action films, dramas, horrors, you name it. We all know that they're gonna get together the minute they lay eyes on each other, so unless you kill him/her off near the end, your argument is futile.
3D is gonna be next, simply because, although it hasn't been used too much, it will be soon ever since fucking Avatar came out and made billions with 3D without even having a good storyline. Not only does 3D make for more expensive tickets, and annoying glasses, but it also ALWAYS leads to the gimmick of things popping out of the screen to show off. I'll be damned for saying this, but the only movie to do 3D right is, surprisingly, Avatar, because nothing popped out of the screen ever, and was used more as a means to immerse the viewer into its epic visual effects rather than as a gimmick. Just a shame the rest of the movie was rubbish.