Use natural pest control
Wildlife in balance helps your garden to look after itself. Take your cue from nature: too much of one thing (usually bad!) indicates an imbalance somewhere. For example, if you’re overrun with aphids – introduce plants that attract predatory insects such as hoverflies and wasps, which in turn will eat your aphids.
On the subject of pesticides… If you must spray, be specific. Look for products that target the thing(s) you want to get rid of, rather than using sprays that kill everything. Many soft-bodied insect pests can be controlled with dilute washing-up liquid (we use a professional version here at Eden). Birds are very good pest control, so don't forget to keep them coming to your garden.