OP- add to your list of rules when flying:
always fly INTO the wind at the beginning of the flight, that way when the battery is low and it is time to turn around you will have the wind helping bring your baby back home. If you do the reverse, you need to realize that the RTH battery calculation will be inaccurate as it has been flying 'with' the wind and when you go to turn around it will suddenly lose time.
That is the very best advice: fly upwind out, recover downwind.
If I didn't fly in 25-35 MPH winds on the island of Curacao, I'd *NEVER* be able to fly! Today is typical, as seen below.