I've got one that you don't hear about too often: try charcoal briquettes on a stump or fence rail, and you don't need a long range to get good practice, plus they're 100% bio-degradable, with a big puff of "smoke" when you hit them.
I use them for .22 LR practice at appropriate distances...stepping back to 25 yds makes them a great offhand target that's tough to hit with a rifle. Up closer, at 15-20 yds, they're a demanding pistol or revolver target, and spectacular when you hit them with a center fire cartridge.
I teach young shooters the basics on paper targets (copy paper with a "bullseye" made from 2" squares of blue masking tape) then switch to the briquettes for the fun part of the session. Kid vs. Kid, with six of the charcoal tgts lined up on the fence rail, soon teaches them not to slow poke they're shots or they'll be left behind, but demands a good trigger squeeze or they'll miss.
The cheapest bag you can buy is just fine and voila: no clean up!
I've also used walnuts, still in the hull, from the grove along our back lawn in the same manner. A .22 LR will tear good chunks off them when hit right but a big handgun bullet will blow them apart. In a good year, I get literally thousands of them on the lawn, and bribe the kids that come to shoot with unlimited .22's if they collect the big hulls for me.
For longer distances, I use steel railroad cross tie plates (about 8" x 15" of 1/2" steel with holes for the spikes...used under the rail on top of the wooden tie). These are good 'ringer' targets for pistol or revolver work and present a good challenge at appropriate distances. They're made of soft steel so high velocity rifle rounds will severely dimple them but for and handgun they're just right. At 50 yds +, they will test your deer hunting capability with a short gun; especially so if you keep them in their natural rusted state...hard to pick out against a treeline backround and tough to see a black front post handgun sight against. Hung from a tree or fence rail, they'll ring when hit and won't need to be set back up.
And lastly, I've got a cpl of the 20# propane tanks that have the old valve assembly; I set out at 100 and 200 yds for rifle shooting. They're a good approximation of the kill zone on a deer and a good-nuf offhand target for practice. Dinging one of them from a steady rest position with a long barreled handgun is fun and will wow your friends once you figure the hold over sight picture.
Have fun,
Rod