I see a lot of threads from new competitors of late, so I thought I'd throw my competition checklist up here in case anybody needs one.
You'll notice the "H" and "L" columns. These allow the checklist to function as a shopping/rounding-up list and as a loading list. The "H" means you have the item in-hand, and the "L" means you have loaded it. I typically use the notes to indicate where I plan to get the item and what quantity/type.
I refine it each time I use it.