It's unlikely that you will ever be bitten by a spider. Most are harmless to humans, except for the tarantula, black widow and the brown recluse. Only the black widow is present in New Hampshire. Spiders are seldom aggressive and bite only when threatened or injured. Though a spider's eating habits are beneficial, they can become a nuisance when they invade your home.
Good sanitation is the most practical method of control.
Collect and destroy spider webs, egg sacs and spiders with a strong suction vacuum cleaner. Move and dust often behind and under furniture, stored materials and wall hangings. Controlling excess moisture and humidity is helpful. Keep basements, crawl spaces and porches as dry as possible. You'll also need to eliminate other household pests like flies, ants and cockroaches which attract spiders.