17 Landlords Remember the Worst Tenants They Ever Evicted

Perform criminal background and credit checks.
These days, background and credit checks are easily and quickly performed, but do be sure that you let potential tenants know that you will be performing these checks; aside from this being the right thing to do, you may also be able to weed out bad tenants simply by making it known that you will be running checks on their criminal backgrounds and credit.