You can use cinnamon or chili powder or oil to keep the crawling pests at bay - although care must be used when using cinnamon indoors, as it can stain. Peppermint (live or oil) is also good for deterring crawling creatures as well as mice.
If you've got the crawly or flying pesky kind of creatures that you would rather not have, we highly recommend Orange Guard. We have used it safely and effectively for several years now, and have found nothing better. Orange Guard is a water-based, food grade insecticide (orange oil) that's safe for people, pets, foods, household, garden, and other uses. You can find out more about Orange Guard in the video below or go to the Orange Guard website.
There are lots of ways to avoid encounters with insects and arachnids that are natural and pose no health hazard to people, pets, or the environment. So, if your Peace efforts with the multi-legged world fail, you can still stay natural, healthy, and environmentally friendly.