This is a tutorial on how to change your skin. ( if you already know how then you don't have to use this tutorial.)

Before: Make a new folder and call it what ever you want i called it My MCskins
Before 2: Download one of the lovely skins of this website and drag it into the folder. Now we are ready to begin.
1.) Have a NON-cracked version of minecraft get it for the $26.00 or what ever it is.
2.) Go to minecraft.net sign in.
3.) at the top there are tabs to go to different spots on the website go to the one that says Profile
4.)Go to the browse tab.
5.) navigate to the folder or where ever you saved your skin.
6.) double click the skin you want.
7.) after that press upload and Whala you have a new skin and show it off to the world.

NOTE: Wait about 7-10 seconds after uploading to give it time to upload the skin to your dude or dudet.

Hope this helps.