High-gloss paints by Benjamin Moore, Farrow & Ball or Fine Paints of Europe can transform anything pedestrian into high style drama. Unexpected colors can elevate your space from boring to special.
Great lighting is like jewelry on your ceiling and walls. We have some wonderful resources right here in the Bay Area that can help you get really creative, including Dogfork Lamp Arts. Keep in mind that you can usually use a bigger fixture than you think.
Put a beautiful duvet cover and a few (but don’t go overboard) decorative pillows on the bed; this is a big opportunity to inject your personality into the room.
Landscape paintings are great for depth, especially in a small room or a room that has no notable view. Keep in mind that you can often commission a particular size from an artist, if you love their work but are having difficulty finding the right-size piece. Turn a boring wall into a great view! Try meandering the Alameda Point Antiques Faire on the first Sunday of every month or look through some great online resources, from Etsy to Saatchi Art.
Remember--if you love it, it will always work. And err on the side of bigger and bolder and you won't regret the choice.