mmm.. yellow squash is one of my favorites.
you can stirfry like the zucchini. you can "bile" it (boil) a country way, by slicing into rounds and slicing onions into rings and layering it, covering it just barely with water (my favorite way) and it will all get soft and fall apart. You can also just sautee it with onions in a skillet (bacon grease optional
squash is good steamed, too.
my dh makes some really bad but good patties, too, by cutting them up and making a kind of hush puppy batter, mixing it all together and frying in a skillet (not deep fried tho). Some people batter and fry rounds of it, too, which is pretty yummy but a lot more trouble.
oh, and, add it to whatever.. we put it in pasta sauce with tomato sauce or pesto and in quesadillas, etc.