[color="#300090"]I think Jan and I have something in common; we both started with crochet then picked up knitting. Then I think we each followed opposite methods. For all I know she may hold her crochet hook wrong like a pencil instead of like a knife. 
I don’t use the right hand throw because it looks to me to be more time consuming. I’m slow enough at knitting as it is without extra movement to make it worse. :doh:
When I started knitting, I naturally picked up the yarn in my left hand because that is how I did it for crochet. I followed the videos and picked the yarn with my pinky finger, then turned my hand and wrapped the yarn to the back of my fingers and began knitting.
It was very tight. I don’t crochet tightly so I asked myself, “what’s up?” Eventually I decided to pick up the yarn in my left hand just as I did for crochet, woven between my finger and not wrapped. Spread your fingers palm toward you with thumb up, draw the yarn in front of the pinky finger, behind the ring finger, in front of the middle finger, and behind and over the index finger. Once I did that, I was no longer knitting tight stitches (unless I wanted to do so between DPNs or at the selvage edges).
You’ve already identified one cause of your tight stitches: holding the needles to tight. Holding the yarn too tight might also be contributing to it. It may be easier to learn a new method than to re-learn your current method with a looser grip on both the needles and the yarn.
Either way, it will be best to be very deliberate in your movements. If you feel your grip get tight, relax and figure out if there is a cause (like yarn slipping off the needle). Maybe a switch to wooden needles would help overcome that “slipping” feeling. It will take time to unlearn the tight grip. Speed while re-learning is not helpful, but repetition is the path to learning.
Complete 3 correct repetitions to wipe out a tight one. Complete 1000 correct stitches with out a tight stitch and you’ve made it.
Sounds like a Rx for a scarf project to me. 
Good luck with what ever method you choose.
I’ll be betting on the continental, Crossed Fingers[/color]