Never hurts to write down torque specs for action screws, scope rings, and so forth, and keep your torque wrench/basic tools with you when you go to the range. Beats trying to find data online out in the boonies if you have to do some modifications or adjustments. If you have pic. rails and a lot of attachments, write down their locations so you can return everything to original locations easily if you take stuff off. Also good to write down your cold bore POI compared to your POA each range session as well as the previously mentioned dope for the day (Date, Time of day, direction, light conditions, Temperature, elevation, barrometric pressure, relative humidity, wind estimates, range, calculated corrections vs actual correction needed are all good data to write down if you have a way to measure.) Then take a picture of your log with your phone and email it to yourself for when you inevitably drop your notebook in a puddle.