On about the 5th world I've created since my main house burned down, I decided to make my stand. I've built a treehouse that is connected to the ground by virtue of a very large hill nearby. Unfortunately, because all the trees are blocking the sunlight, I'm going to have to burn/chop down quit a bit of them in order to make my house a bit safer and start some friendly mobs spawning... hopefully some wolves, too...
Just put torches on all the trees.
"The way I see it, every life is a pile of good things and bad things. The good things don't always soften the bad things. But vice versa, the bad things don't necessarily spoil the good things or make them unimportant."