There is a lot here to write about.
1. At the beginning and end of each season carefully inspect your limbs, string, attachments and any screws. Tighten anything that needs it, if limbs show any sign of a problem see the dealer.
2. Once you have the bow setup and shooting correctly mark with a sharp knife making a fine line, the settings of everything. If something moves a little, the two scratches will be off and you have a place to go back to. Measure the distance between the pins on the cams and write it down. Also measure the distance from the string to each limb where it meets the riser. Write that down. If the string streches, tiller is off.....you have the previous measurements.
3. The string should have a good string wax rubbed ito it. Rub the wax on first then take a piece of leather and rub vigoursly up and down the string working the wax into the string. The wax protects the string and acts as a lubricant. Yes the string is a moving part. Then take a piece of dental floss and wrap it aroung the string once. Pull lightly along the string to remove the excess wax.
4. I also put a little oil on my cam pins, bearings and limb bolts. Up here rust is a never ending battle and a little lube really helps prevent things from rusting. The animals have no clue what oil is here so it does not matter.
Hope this helps. I am doing all of this tonight as I leave in the morning for a caribou hunt then a sheep hunt in the Brooks Range of Alaska.