I use paper print-outs for the running records in my room. Once those sheets are full I put the data into my Excel record sheet (backed-up on a floppy) and start a new print-out page.

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EDIT: This is an abbreviated version of the basic template. Normally I have a lot more room for feeding/weighing.
At the top of the sheet I have info about the snake and it's acquisition. I record the species, the number (order of acquisition within the species), the sex, the birth year, the breeder, the date of acquisition, and the price. I record weights every week and weigh each feeder. I take other notes (sheds, poops, regurges and whatever else) at the bottom.

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My long term sheets have only a date and action. I've thought about simplifying the short-term sheets but don't feel the need and I like the quick tracking of meal mass to snake mass.
Of course there are a million ways to keep records; this is just mine.
Cam