A huge help to your humble correspondent, a noob, is the point-and-click list-building program called Army Builder. Not only does it help you keep track of the points as you are putting your list together but also keeps track of the unit statistics and prints out a list specific quick reference sheet that they call "footnotes."
Look towards the bottom and you can see the psychic powers, special rules, unit types, wargear, and weapons associated with the troops I have added to my Ultramarines List. The program also tells you what page you can find the rule on in the rule book or Codex for clarification.
I know the program is $39.99 and I'm never one to tell someone how to spend their money. But I justify it like this - in the three months or so I have been involved in 40K program must have saved me 5 hours of list building, tinkering, and "hand-writing it out" time. My free time is worth more then eight dollars an hour.
The Stout Smurf