Trail Running Hills: How to Stop Being Scared (and Start Running Them Stronger)

“One topic that many members would be interested in, is how not to be ‘scared’ of the hills. How should we approach them not just physically but also mentally?”.
The Importance of Pre- and Post-Run Stretching for Trail Running

“What is the importance of stretching before and after a run, and can this be incorporated into your run?”
Trail Running Technique: Foot Strike, Downhills, and Confidence on Rough Terrain

What’s the best technique to use when running on trails? By this I mean, I have noticed some people run more on their toes than heel strike. Is this just personal preference or style? And should it change when going up and downhill? Or on rough terrain?