I have to agree with QM on this one.
Having worked with several pilots who fly both Rotary and planks (In the same boat as HeliEng), the most organised of all are those that computerise their Log books.
I have a Handspring Visor (£199.00) and have downloaded a Log book programme (£15.00) as a trial to convince other pilots to use it. It's superb. It takes a bit of time to get all of the different aircrafts details in, but it will even do your C of G for you.
You can also use the data to print off forms in in Microsoft Office Applications.
Stop killing the trees. Get a paperless office.