First, second, or third backup???
I have multiple lighters, books of matches, a flint and steel with dryer lint in ziploc bags.
Then there's the car battery with jumper cables in a pinch (assuming I'm driving it of course)... Or the flares I keep in my trunk.
If I'm already at my BOL, we have 2 ATV's and 2 lawn tractors, so there are more batteries in case I get that far without success.
I used to be good with a magnifying glass too, but it's been 5 years or more since I practiced that.
On of the smaller projects I want to accomplish this spring is a fire piston. My brother made one a few years back, but I'd like one of my own to include in my preps... I'd also like to get good at making bow drills down the road.