There are a variety of pests that can come into your home. You'll want to get rid of then fast and importantly, stop them coming back.

Preventing pests coming in the first place is clearly preferable. Most pests are looking for warm, dry, dark, quiet places, a source of food, and a place to make a nest. If you are offering them all of that then you're bound to attract them.

If you don't fancy tackling them yourself most councils will be able to help.
Additionally many pest control businesses will be able to deal with the problem if you want to pay for the service.