How to add a mod to minecraft?

I followed the instructions but it always crashes, so what is the problem?

Guest

Sounds like you're installing the wrong version mods for your minecraft version. For example installing 1.6.4 mods to a 1.7.2 minecraft update will not work. Make sure the mod version is the same as your minecraft version.

Ducky

Go to this website: http://www.skydaz.com/
They have mod installers

ExplodedMr T