I found this:
"I undo the neck strap and twist it three times then re-attach. I hold the camera in left hand and let the strap hang down in front of me and insert right hand thru the middle of the loop and draw it around to the right in a circular motion counterclockwise so the strap is rolled around my wrist. Do that once, twice and a third time. If the strap is properly lengthend the last twist gets my hand on the grip with the last bit of strap coming over my knuckles to attach to the camera. next to the shutter button. If you have twirled the neck strap properly there are no twists in the strap. Tighten/lengthen to suit your taste. Sometimes I like to leave enough slack to be able to put left hand thru the remaining loop so i can pull the strap taut while using the left hand on the lens. I carry the camera this way all the time unless it is in my bag. It never ever hangs around my neck."
And this
"
i use one of those old fashioned hippy tapestry straps. the real deal, not those ugly ones made for dSLRs recently. i know a lot of people here swear by their fancy slings with lots of gel padding and cool features but... there's something very straightforward and honest about these old things. screams "i'm old skool." plus, the red ones look downright mean on nikon cameras.
anyways, i have it done up pretty tightly, and on a set of leather strap extenders. like locking the rotating clips onto those rings more than the little triangular gromits. when at all possible, i ditch the strap all together, but obviously not if i'm out and about. i carry my camera on my right shoulder, and the strap is short enough that my camera rides just above my belt. it's faster and easier and less touristy than around the neck. and chafes less. with the grip, my camera generally hangs in a nice vertical position, and not that silly lens-down position.
my technique is as follows:
1. grip the camera in my left hand by the lens.
2. push my right out a fair distance, between the strap and the camera body
3. rotate my right hand counter-clockwise once, maybe twice depending on the lens.
4. gripping the camera again.
when done right, all of the strap is now out of the way, and the leather extender falls just under my index finger, or is draped across the back of my hand with the rest of the metal bits of the strap. the strap isn't tangled, because the clips rotate. none of this unclip and re-clip stuff, i don't have time. with only one loop, and feed the other arm through and use it to help stabilize long lenses. but i'm rocking a d200 with grip, and it's farily stable as it is, and i typically use short lenses. so i generally don't.
i tend to wrap my arm in the strap mostly in situations where i really don't want to drop my camera. i know i won't, but... well, sometimes you just gotta lean out over balconies and whatnot to get the shot. you know how it is. i'm a little less likely to do it if i know i'm gonna be switching to vertical, because it kind of messes up my ability to use my vertical grip."