I've done my own service on the Jag, i have the JTIS which is the full mechanics system, and one of the things on it is the service sheet. i printed that off and and filled it in, attatched the receipts and signed the service book, and put the service record in my folder of receipts.
i also keep a spreadsheet for all work done on my car, the mileage, cost, reason and result. along with the date. all in order.
i've done this on all my cars and with the folder of receipts all in order to acompany it, makes selling the car very easy. buyers see it and read through and the spread sheet works abit like a contents page to the receipts. all the private buyers i've sold to have loved it and in a couple of occasions its secured the higher price as buyer has said they planned to haggle down, but can;t fault it or the evidence that its been well cared for.
I'm lucky with the jag as i have the previous owners paperwork as well so documented it for the last 2 owners including myself.
anal yes, but useful