Spiders are very beneficial creatures in the environment. Don't get rid of them. (unless you have a high number of poisonous spiders near you house, you can remove whatever is attracting them to you house(it might be wood piles, or if you have old food... laying around that might attract prey bugs that attract predatory spiders) and use natural deterrents and natural ways to decrease their numbers near your house(without killing them), or relocation). Poisonous spiders can usually eat more pest bugs than non-poisonous because the poison digests the bugs faster.
Spiders usually avoid and don’t' bother people, and they are pretty.
Add running water sources, bird bath/shower, and bird and bat houses, change stagnate water weekly to avoid mosquitoes, and keep bird/bat houses clean to help avoid disease spread. Birds and bats eat bugs
ladybugs, preying mantises, and lacewing larvae(adult lacewings eat pollen/nectar), eat bugs, these can also be added or there numbers encouraged to increase by providing shelter and water for them.
Frogs, lizards, and some fish (particularly the mosquito fish and guppies) eat bugs.
Use bug lights outside and around doors and windows. Yellow “bug lights”, LED lights, and sodium lamps won’t attract mosquitoes
some well-placed fans can help keep decks and porches mosquito free.
Near your house you can Remove low-lying brush or vegetation. Keep shrubs and trees well trimmed and grasses and weeds short. This will decrease moisture and increase wind and sun exposure on your property, making it far less hospitable to mosquitoes and other biting insects. Mosquitoes roost in shaded, protected areas. mosquitoes live in tall grass, bushes and shrubs.
(mosquitoes might attract predators such as spiders. with competing predators eating the spider’s food source the number of spiders might decrease in the area also)
Make sure you have no stagnate or slow moving water that mosquitoes could breed in, mosquitoes are a food source for spiders.
dont leave garbage outside. Broken or clogged rain gutters, old tires, leaky air conditioners or outdoor faucets, boats, street gutters, holes in trees, catch basins, low spots on your property, watering cans and wheelbarrows, bird baths, fountains, rain barrels, and plant trays commonly have stagnate water.
You can also set traps specifically designed to trap mosquitoes and not other bugs. You can also set specific traps to trap ticks. Make sure these traps are at least 40foot away from areas where you regularly go.
http://www.youtube.com/watch?v=tp_GwpgA7Fc&feature=feedrec_grec_index
Keep your house clean and make sure spiders are not able to enter your home thru small cracks.
If you have an outdoor compost pile, consider making it a hot compost pile(search hot compost) and/or using worms to help decompose the pile faster, and also to cover the pile with clean plant material to try to not attract as many prey bugs that would attract predatory spiders).
Many people try to increase the number of spiders in their yards because they are good for eating true pest bugs. If anything give some away or sell them or allow people who want spiders to catch some from your yard to bring to their yard or for breeding, don't kill them, and after getting rid of a bunch don't be surprised if the numbers of true pest bugs such as mosquitoes, and bugs that eat you and your plants, increase a bunch. The more you kill beneficial things in the environment, the worst your environment will be. Don’t start down the path of trying to kill everything or eventually you might end up with a desert full of agent orange resistant true pest bugs(the type that eat you and your plants).