In this video, we see the start to finish process of creating a model, baking the textures with Blender's Cycles baking, using the built in Sketchfab Uploader, and completing the setup on Sketchfab.com
You can see the model on Sketchfab here: http://aesmith.co/-/sf_cyclesbake_3d
You can download the .blend file here: http://aesmith.co/-/3d/sketchfab_cycles_baking_tutorial.zip