If you’re planning your summer visit to Saratoga — and why wouldn’t you — or if you’re already on the way up to, know one thing: any complete day at “The Spa” is a marathon. If you want to do it right, you’ve got to be at the track early to watch morning works, spend the afternoon at the races, win some money and then take that money out on the town for a bite and a post-race drink or two.