If you mean two half links, that's exactly the way I do it and it always works perfectly for me. Why make it more complicated than that?

Sheldon advocated using the same method:

"The best technique for setting chain length is to thread the chain onto the large/large combination, without running it through the rear derailer. Mesh the two ends on to the large chainwheel so that one complete link (one inch, -- one inner and one outer half-link) overlaps. In almost all cases, this will give the optimum length."