I don't know about you but in my more megalomanic dreams I've ruled the world. Now I know this isn't possible, mores the pity, but I have figured out a way to create my own world by using Photoshop and GIMP, the image and photo manipulation and editing software. Photoshop is quite pricy but is the worlds leading software in the field, however GIMP is free and does an amazing job too.
Within a few minutes you could create an amazing planetoid, similar to the ones seen below or like the ones in Mario Galaxy.
To create these wonders of the world just follow my guide and pretty soon you have have your own world, created by your fair hands. Here are a few examples of the planets I made with a step by step process. If you follow my link at the bottom of the page it will take you to my lesson plans and guide on TES.