The easiest way of catching rats is to set out rat traps and bait them with some bait foods or you could set out rat poison but that's not a good idea if you have little kids or toddlers in the hour or even pets.
Some good bait foods to use to put on a rat trap to catch rats are, cereal, vegetables, meats, fruits, bacon and even peanut butter.
All those foods and food types listed above work great on rat traps as bait to lure the rat to the trap.
Make sure the food isn't easy to get off the trap so the rat will have to work at it to get to it.