Tired of having someone be like "HA HA HA thats a noob's skin"?, or you don't want a platic/basic skin? Well I think I can help.

                                                           Things Needed 
                                                     
                                                   paint.net (found here)
                                           your skin (no matter how bad it is)
                                a shading template (found here) and skincraft (found here) if you need a 1.8+ skin
                                           
                                  
STEP UNO (For 1.8+ Users) Go on Skincraft take the shading template redownload it and it will become a 1.8 skin

STEP TWO Right click on your skin (NOT THE SKIN TEMPLATE) select open with and select paint.net

STEP THREE Drag your shading template to your and select "overlay" if the shading template is showing ontop of your skin you did it right.

STEP FOUR Go to layers and click on layer proporties and select "overlay"

STEP FIVE Enjoy your shaded skin