I like to grill them and put them in a salad like this one:)
http://www.epicurious.com/recipes/food/views/Grilled-Zucchini-and-Bell-Pepper-Fattoush-238777 (I mix and match zucchini and yellow squash, depending on what's on hand
And I haven't tried this one yet, but it sounds good:
http://www.nytimes.com/2011/04/27/din... (yes, switching again)
In my South.. a common/preferred method is to slowly Saute/Caramelize a Vidalia onion in a little butter until tender...Cut the squash in to 1/4-1/2 in wheels....add a bit of water and slowly steam/stew the squash and onion together until very tender.....Of course salt and pepper....A pinch of sugar is not unheard of....
You can also cook it down to a point where their is no liquid....Add flour and mostly cornmeal to form a patty.....Coat in a meal/flour mixture and fry like corn fritters/ hoe cakes...whatever....
Also you can just slice.. S&P.....meal and fry..... Like fried green tomatoes.....