When we get frisky we take dryer lint and push it in egg cartons then drip melted wax on the top then cut those up, works GREAT
My go to is fat wood, buy it in huge quantity like
HERE, they come in big pieces, take a hatchet and split them into pencil size pieces, take say 3 of those and light one and put them under some kindling then put firewood directly on top of that and you have a fire... as far as quantity and storage, one of those boxes fits in 3 of the christmas style popcorn tins and one box lasts me 3-4 years (they're cheaper in the off season)
The other dumb option is hand sanitizer, it's amazing what 3 squirts on some kindling will do
, I found gallons of hand sanitizer at home depot clearance (it's crazy what they do once they're not required to supply it...) for $1 a gallon so I bought a bunch of that so I'm covered for years...