There are elaborate fence projects, landscaping plans, and new poured concrete sidewalks, and then there are the rest of us. We want our home exteriors to look better, but we don’t want to spend a month —even a weekend — working on them. Here are the fastest of fixes for lousy curb appeal, and they take only a couple of hours out of your day. Just a quick color change can take your boring door to a whole, new level.