I suggest planning to watch the second parade, since it won't be as busy. Wishes are best seen from Main street USA, or over toward the washrooms around the corner from the Plaza restaurant. Over by the crystal palace is good too, but if Tinkerbelle is flying, she lands in Tomorrowland. If that is not important to you, anywhere near the castle would be fine. It gets quite crowded at the hub. If you have small children with you, try getting a place with a fence in front of you so their view is not blocked by tall adults. If it is a busy day, or a great view is important to you, you might have to claim your spot an hour earlier, which could be problematic because of the first parade.