If you're logging time (or eventually plan to) in B737 and AW139 class aircraft as I have
Out of curiosity, where can one get such an awesome job?
Coming back to logbooks, I also keep 2 separate. It's easier to add hours from 2 logbooks when needed, than weed out the needed data from a common logbook. As for the spreadsheets, e-logbooks etc. - they're good to extract specific data (like: PiC hours on certain type, etc.), but I found out they are time-consuming to maintain and (surprisingly!) more error-prone than hardcopies. After experimenting with several electronic logbooks (Excel, Logten, MCC) I decided to stick with the paper one...