Weads, pace out the distance between your pilot seat and the heel of the skids, measure it and practice walking around dispersal (or even a parking lot) trying to visualise that distance behind you - place your self in a particular position forward of a line or other marker (without looking at it) where you think the skid heel would be and then measure how far out you are. The more times you do this, the better your judgement should be.
We used to encourage pilots to do this to help assess where the tip path plane was so that their judgement of how close the tips were to trees or cliffs improved.
It's the same as learning to park your car or squeeze it through a gap - practice makes perfect.