I must confess that this is probably the tip that we have violated the most. In our quest to cover a lot of ground in a 3 ½ week time period, we have far too often zipped through a particular place, just touching upon its highlights. In all fairness though, some places--especially those that are mostly scenic drives or short hikes, can be given justice to in a single day.

However, many places have just so much to see and do that you really need a couple of days to experience all it has to offer. Also, at any destination where you plan to do an activity that's going to take more than a few hours, such as a long hike or bike ride, or boating, you really need that full day to make it worthwhile.

Besides, staying put for two nights is a great way to prevent trip fatigue from setting in.