Farmscaping to Enhance Biological Control, a site of the National Center for Appropriate Technology (NCAT), provides an overview of the concept of Farmscaping or diversifying a farm to support and enhance beneficial insect populations. There is an encyclopedia of information in this site. Of particular interest to gardeners are Appendices A and B: Plants that Attract Beneficials, and Pests and Associated Beneficial Insects. They are well worth perusing for ideas on which types of plants you might want to add to diversify your garden.
Clever Gardening Technique
If you have pillbugs and sowbugs pestering your strawberries, try setting some collection devices out in the garden. Remove the mulch from the area and place a hollowed-out cantaloupe or other melon half, rind side up on the ground. Or simply place boards on the soil surface. The pillbugs will gather under these to hide or feed and can be easily picked up and dropped into a bucket for hauling away. This technique will work to attract slugs and snails, too, if there is not another suitable hiding place nearby. Add some wood strips to the board to create space for the snails and slugs to gather.