cold-crashing will go a long way in making the hops sink to the bottom.
putting the pellets in a hop bag will work, but that not optimal IMO since the bag limits how much interaction the hops have with the beer. set those pellets free.
instead, take that same hop bag - with its fine mesh - and stick that over the end of your racking cane when you transfer. sanitize the bag beforehand and hold in place with a twist-tie (also sanitized). if the bag is good enough to keep the hop particles inside, it'll do just as well keeping them from going into the racking cane.
edit: what chumpsteak said.