This might be considered more New Age than Pagan, more 'spiritual' than 'witchy'. No matter— magic is magic, and works regardless of systems and labels.
It is an astonishingly effective technique for ridding yourself of those problems which appear insuperable. I've used it a number of times, and can attest to that. My title is perhaps a bit misleading; it is not so much that the problems get solved, although they do — it's more that the problematic situations simply vanish from your life!
It originated with the great spiritual thinker and writer, Emmett Fox.
Here is a link to the complete text of The Golden Key.
And here, for good measure, is another article which explains it well.