I like hiding a sturdier metal post inside a fabricated wood post, then attaching the remainder of the fencing to it. Great for high wind areas.
How to build a horizontal fence without a lot of effort?
How to build a horizontal fence with your own hands
If we ever have to re-build our fence, this style is awesome.
How to Set Fence Posts That Won't Rot: The Family Handyman
How to Set Fence Posts That Won't Rot
27 Cheap DIY Fence Ideas for Your Garden, Privacy, or Perimeter