just like working end grain,...keeping extremely sharp cutting edges and scrapers and many very light cuts to avoid tear-out. worst thing you can do is get in a hurry. you can work fast, but you have to follow the above advice. you will get faster as you gain experience and confidence in what you feel as your tool works. a good piece of curly maple, one that has been cured correctly will be fairly stable and won't necessarily tear out if you keep the above advice in mind as you work. I think, to some extent, what scares new people about curly wood, is all the advice about how easily it tears out,....much of this advice comes from guys that don't really know what a sharp cutting tool is and have never really used one correctly.
be careful, of high grade curly pre-shaped stocks that have been in the pre-shaped condition for a long time sitting on the shelf. the outer layers of the grain can get brittle and that may cause tear out quite easily. the more curly the wood is, the more important that it be shaped right before shipping, so the outer grain is fresh and a bit supple.