Ran across a reference to an Oreilly book entitled Digital Photography: Expert Techniques. I'm always looking to improve my Photoshop skills so it caught my attention since Oreilly books are generally very good. Even better, you can download Chapter 3: Bringing Out the Best Picture. I learned a few things about using Photoshop to get levels, contrast and colour balance correct.
It also recommends always shooting in RAW mode to maximize the amount of detail and colour information you capture. If you also have a Nikon Coolpix 5400, you can upgrade to version 1.4 of the firmware to get this feature. Isn't it cool being able to upgrade a camera through an Internet download?