I would be studying my chemistry notes for the final exam. This means I'd be looking through my great big file cabinet that contains all the notes I've taken for the class (theory: since a lot of work now is made using computer applications, if we had to hand write them, it would take a lot more space. Yet again, the printing press was available.
). Also, I'd probably have something to do in the woodshop. Instead of using inventor, I'd have to use a drafting board, T-square, 30/60 and right triangles, rulers, tape, pencil, erase, that curvy thingy, and whatever else manual drafters use.
Then after all that, I'd be maintaining the front and back yards of my house. Before going to bed, I'd read LOTR.
Basically, without the computer or internet, my life would be much, much different and so would be what I'm doing right now.