I have found a cool game, it's a indie game and from what I here it won't be out for a little while(Indie developers went bankrupt or something back in July, but I guess there getting back on track now) . But they release these free to play, good looking, online games to play, the newest one is called Bullseye. You level up your gun and what not, and you shoot targets, the graphics are nice to. I've been playing it for little bit now, and I thought you might what to play something fun and addictive when you are having those moments of boredom.

Here is the Game. It says it works best with firefox. (It will ask you to download unity web player thing, just do that and it will work.)
http://www.interstellarmarines.com/game/bullseye/

Tried this Bullseye version out today and I have to say that this is an incredibly fun shooter. The Bullseye mechanics seem very realistic, and it would be a great way to touch up on your precision and target skills.

I will definitely be getting Interstellar Marines when it is released.

I tried this and it was fun but it was very laggy for me, its probably my computer since its a mac notebook and not exactly made for games but im upgrading my graphics card soon so that should change