I use junk mail, Kleenex/Paper towels, cardboard. -- and the carcasses of door to door salemen, that's what will clog up your chimney...
We throw shrimp shells, scraps, and such in the fire. Prevents the critters from getting into the trash outside.
I usually clean out our stove pipes 2x a burning season, but we burn 24/7 in the Winter.
It takes too long to heat up, if the stove goes out, so I split some over-nighters from 20" rounds just split in half, damper down and throw on before bedtime, coals in the morning.
Never had a chimney fire...knock on wood