One of the best things I have come across to help perfect your photos is to shoot in the RAW format rather than JPG. Some photographers would disagree and say you should get the shot right first time in camera without post processing on the computer, but I disagree. With RAW you can either make minor adjustments to make it perfect or drastic changes to give your image a different 'feel'. Most of the pictures on fotoviva are taken in RAW mode.
If you have a point and click camera, chances are you won't have the RAW option, but if you have a DSLR or bridge camera you should find it under your settings. You will also need a program such as Adobe Photoshop or some other image software that supports RAW files. Photoshop is one of the best and has some great features in the program.
So what is so good about RAW?
When shooting in standard JPG format your camera takes the settings and creates a jpg with them. With RAW your camera takes the settings but does not embed them into a file. It simply says "these are the settings you used, but feel free to change them to suit before finalising to jpg.
You can change the white balance, exposure, contrast, and many more settings. It's well worth it to get that perfect result. But remember, it's always best to try and get it as near to perfect as you can in the first place, rather than relying on with RAW settings.
You can find a great tutorial by Adobe here.