The easiest way to prevent flea & tick-borne illness is by getting a monthly flea + tick preventative. There are various different types, ranging from topicals to chewables and collars. A topical is normally a liquid that is squirted between your dog's shoulder blades. Chewables are ingested orally and collars are worn throughout the period of effect stated by the manufacturer. Brands include NexGard, Seresto and Frontline.
Depending on where you live, protection is particularly important during hot and humid months and in swampy or areas of dense forest.