1 for Electric (for a sub panel in the shed)
1 for Structured wiring (ethernet, speaker wires, cable, etc.)
1 for Gas (not actually for the shed, but I plan on having a gas tank, so the pvc is merely there for them to pull the gas line from the house to behind the shed/barn where the tank will be)
I'm not concerned right now with the gas as I will get recommendations from the gas company on that one (I let them know I would be running the PCV in preparation and they were ok with it since I was going to be resodding before the gas line would be put in, and I wasn't ready to add the gas lines yet). For the electric, I will likely have an electrician come in and do the final hookups and run the power in the PVC (electrician recommended the PVC, so I'm thinking he's ok with it)
My major concern is I have a 2" pipe sticking out of the ground near the shed and the house and I"m starting to wonder how do I tie that connection into the house. I will need to run it up to the attic on the outside of the house (the wires are run in the attic for the rest of the house). The only thing I can think of to junction the inside to the outside is either a PVC LB:
or maybe doing something like this person did here (source: http://www.dslreports.com/forum/r26250317-Structured-wiring.-How-to-get-from-outside-to-in-)
If anyone is curious why I'm doing this, I have a pretty good reason. When I decided to build it, it was meant to be a shed (only needed electric which my electrician said he could add any time I wanted). We've since found out we are expecting and since I work from home, I though at some point I may want to divide the building in half and make it my Home office, freeing up a room for another bedroom or to use as a playroom for the two youngest boys. I woudl also separate me from the "noise" of home life when I needed it for work.