Recently I have started shooting using a Blackrapid Metro strap. I have to say until you have shot using one of these things you dont know what your missing. This model is on of the most cost effective at US$39.
The strap goes across the shoulder and spreads the weight of the camera evenly across the body. When you want to take a picture the camera comes up the strap, take the picture then put the camera down by your side. I have long struggled with heavy gear around my neck causing my neck and back pain. The strap is equally comfortable whether your using a heavier lens such as a 55-200 or a much lighter 35mm lens . The strap keeps everything well balanced and feeling comfortable across your body.
The strap screws into my shoot grip via the tripod mount . Its tight and secure.
Coupled with the X PRO 1 and this strap shooting has become far more enjoyable and less taxing. I am also getting shots I didnt get before because my camera is far more accessible than it was either in a bag or around my neck. The strap can be adjusted for all body types and heights making its very useful for all. At $39 its a great buy.