First thing, complete that 550 piece jigsaw puzzle.
Then invite some friends over.
Video 1(youtube) - original 22.9 MB
Video 2(youtube) - original 24.9 MB
Video 3(youtube) - original 17.9 MB
There's only some much aluminum flashing you can rivet on, and
wire you can twist until you just gotta replace your 13-year-old
chimney cap.
Video 4(youtube) - original 26.2 MB