Log screenshots

Take screenshots, say, one in every 15 mins. These would be stored locally (?). One year of 150kb jpegs every 15mins would take about 5GB (without gaps).

Screenshots would help in project tracking. On top of seeing hourly aggregates you would see some actual screens with exact timestamps.

I once used this User Logger software and the screenshots were helpful:
http://chemware.co.nz/usrlog.htm