My FX gets typically 60 mi, plus 3000 ft vertical, if ridden conservatively. I ended up exploring the roads in all directions from home over the course of only 5 or 6 joyrides, as it's really not that big an area to cover. That helped me develop a sense of how how local terrain impacts the range. It boils down to maybe four classes of travel: freeways 55-65 mph, expressways 45-55, mountain roads 25-50 with elevation change, and city roads 0-40. Once you understand how these classes affect your range, you can guesstimate pretty accurately what you're in for by looking at a map. I might get 70 mi on a road like El Camino Real.
Three times now I've planned out trips and arrived with 5% left. Talk about risk and range anxiety. When things started looking iffy, I got real conservative, and so far have not had to beg for an A/C outlet or call out a trailer. Each time has been pretty much exactly 60 mi + 3000 ft vertical. Once I continued riding circles around the neighborhood until it went flat (at 62mi it jumped from 3% to 0%).
I also do mental calculations along the way, such as "It's down to 75% after 16 mi, so that took 1/4 capacity, it's on track to do 64 mi." Or "Last time I got to this destination with 65% but this time in ECO mode I got here with 75%, so I can enjoy getting more aggressive."
Finally, the freeway is always a definite no-no when pushing the range. Coming down from a mountain is generally free (but regen will net only a fraction of 1%).