Many EMS jobs are on roads (nature of the beast) so deliberately aim slightly off to one side of your target on the road. Then, when you reach the line feature, you know which way you have to turn to find the target. Which works fine 'til the police report the accident as being in Romney but it actually turns out to be in Hythe - ho hum.
Knowing your groundspeed in miles per minute, making a simple plan then flying that plan accurately, being able to judge angles (bearings) to within 5 degrees "by eye" - all help when you're flying an EMS aircraft with just stopwatch and compass. Anyway, sad old duffers like me can't really see a moving map on t'other side of t'cockpit in the more modern aircraft. Even if we could, there's the quandary of "how do you change the Track Line from blue to magenta?" (the blue is difficult to make out with the viewing angle on some screens...) which no amount of going through the book can uncover (answers on a postcard, please)