Plant native trees and shrubs - they support more wildlife.
Have a variety of heights - much more bird friendly.
Chose 'open' flowers that are easily accessible to bees .
Think before you use a petrol machine - does the grass really need cutting? Do I need a chain saw for that branch? Consider alternatives: push mower, scythe, saw, loppers.
Do not rush to tidy up in autumn. Dead flower heads often provide homes for overwintering friends.
Use green manures. They improve the soil as well as providing colour and interest eg. Phacelia, Clovers, Buckwheat.