Rules of thumb may give you a sense you are trying to do the right thing, however they will never cover all cases.
5 sec between 80kts & 100kts, if you are half a second out, that is a 10% error.
80kts by 1500' markers, thats fine if you don't have a displaced threshold or an intersection departure or a 4000m runway etc.
An accelerometer programmed for individual runway configs could be of use, but I don't know if these exists.
The only way is to ensure your data input is correct and independently verified.
Check your ATIS independently.
Calculate your take off weights independently, close your performance book (reset your EFB) after calculating your figures.
Write your figures on separate pieces of paper.
Then come together to check your differences.
TOLD cards can be an issue when pilots source data from them to calculate TO data as both pilots end up using the same incorrect data.
Finally, don't have pilots covering for other departments due to cost savings (load control etc) with the resulting time constraints affecting their ability to concentrate on the things that can kill people.