Jude and me (but mostly Jude), scanned in the land registry map we got when we bought the house, imported it to Inkscape and traced the lines. She also imported the aerial photo from bing maps (higher res than Google for our area) and copied the bigger bits in too (shed, oil tank, big trees etc.) We also noted north and things we like and don’t like. Views of the mountains, we will put the patio so we can see them when we sit out. Neighbours with big dog, we will plant some climbers and busier plants to disguise the big gappy fence between us.
We printed a few out to draw on. After we got some better ideas, we put them back into the Inkscape drawing too.
It’s worked well for us so far. We’ve come up with a better design than if we were just looking around in the garden. Now all we need to do is start digging.