By encouraging wildlife to visit your garden you can attract cheap and natural forms of biocontrol to keep pests at bay. These beneficial insects include ladybirds, lacewings, spiders and hoverfly larvae. Insect hotels are an excellent way to do this. Please research insect hotels carefully, as many commercially-bought hotels can be more harmful to insects than good. The key to a good hotel is to get one with removable parts so that they can be washed. Likewise, by keeping some areas wild and planting a variety of seasonal blooms, you can attract beneficial pollinators to the garden, such as hoverflies.