So matt showed me the crazy building complex he built. Its crazy, and has a volcano. So I thought, man...I need to step up my game! Get building! I can make something cool!
Then I find a cave and spend all my time exploring it. It was literally a hole in the ground with a waterfall leading in. Its a good thing I took things a little slow and didnt let the water take me all the way in, because right where the water stopped was a huge vertical shaft with a lava pool at the bottom! I built a makeshift staircase down there, got some redstone, a couple diamonds, some gold, and Im getting a lot of coal. There are a couple lava pools in the area. One had some water already on it so I can mine out the obsidian if I felt like it. I'm tempted to make more obsidian from the pools, but they aren't really useful other than decoration. Now I'm thinking of saving the lava so I can pick it up in buckets and use it as a light source in whatever it is I end up building.
You know...when I get around to building.
EDIT
I thought I fully explored that cave, so I went to look at another one nearby. It was also huge, lots of running water and lava in these caves. Turns out its actually connected to my first cave. I need to get ambitious here, I have so many materials now. Lots of iron, coal, a smattering of gold, lots of redstone...