There are 3 main schools of thought that I know of.
1. Shackle a fixed-length snubber to the bobstay fitting low down on the
hull. Advantages: increases the effective
scope by lowering the attachment to the
boat. Disadvantages: hard to adjust, possible to lose the end when retrieving or adjusting the
rode.
2. A snatch block at the end of the
bowsprit (I helped a friend set this one up). Advantages: more leverage to straighten out a boat that "tacks" around at
anchor, Can adjust the amount of
scope by either having a long snubber, or letting one run free and running another one (2 snatch blocks make that easier). Disadvantages: the attachment point is usually higher than the
deck, causing a decrease in effective scope.
3. Run a bridle through
deck chocks like on a boat without a bowsprit/bobstay. May need chafin
gear in case it rubs on the bobstay, though.