Minecraft forge how to turn mods on and off?

I have pixelmon, and want to try the tale of kings mod (I think thats what it is called.) I want to turn pixelmon off, and turn the tale of kings mod on. When I'm done with the tale of kings mod, I want to turn it off and turn pixelmon back on, and be able to continue from where I left off with pixelmon. How can I do this?

Added (1). Replace tale of kings with "Tale Of Kingdoms"

Added (2). Is there an easier way?

Tiny Kitty

If you go to your mods folder you'll see that every mod has '.jar' or '.zip' at the end, to disable a mod just add '.disabled' after the '.jar' or '.zip'.

MaX