Keep White Balance on 'Auto' most times, but change them when shooting in a light source that does not look right on the LCD (i.e. the picture looks way too yellow, red or blue).
Test before you decide to move on,cause digital cameras allow it without expenses.
If you find that the color still looks a bit 'off', use the camera's Custom White Balance setting. This makes a one-off reading for that specific lighting condition.
Try different White Balance settings until you find the one that looks better,it can include Tungsten,Fluourescent 1, 2 and 3,bright sun,etc...
Tone ControlYou can set your camera to shoot in a range of special tone modes: Contrast, Sharpness, black-and-white, Sepia,etc... Most are a marketing gimmick. While they produce fun results, I'd suggest not using most for the simple reason that it's easier to change the tones later (on a copy) using your picture-editing software.If you really have to (and remember that all three tone settings can be changed easily using a picture-editing software program like Photoshop Elements), the only one really worth adjusting is probably Contrast.Set this to 'low contrast' when shooting in the bright sun (ie. at midday), or to 'high contrast' if the weather is heavily overcast and the lighting flat.