The input I use are date, hours, minutes (I round to the closest 1/4 minute), miles, and average heart rate (add cadence for your tracking). I accumulate the following stats and graph/tabulate: cumulative miles, miles/month, miles/wk, avg miles/ride, hours/month, avg minutes riding/day, avg speed/month, max stats (speed, ride length, ride duration) and maintenance info (miles since lube/chain clean, chain miles, tune up miles, and tire miles). Many charts also link to the previous year's data for comparison. I do not link more than the previous year. Each new year takes about 20 minutes to recreate the previous year's links to the new spreadsheet.