Favorite decorating tip: Lighting is really important. If you can afford it, a great lighting designer knows what to light and how to light it and can do so inconspicuously—that's an art in and of itself. Just as important is designing around a location. You don't want to overbear your location—you want to enhance it.
Favorite splurge: Make sure there is decent parking if you're not doing valet. I mean, trekking six miles to your car because there's nowhere to park is miserable! Here's another nice touch: if it's going to be cold, do you want your guests to be freezing while they wait for their cars to arrive? Put a nice heater there. How easy was that?