If you are using MS Excel, use two separate columns for hours and minutes, and a bit of judicious arithmetic in the totals column - easily done.
Or one column with times entered with hours and minutes separated by a colon eg. 1:30, 0:50, 2:25 etc.
In order to make sure it deals with totals exceeding 24 hours you need to set the cell format to [hh]:mm using Format Cells/Custom.
Or try
this Excel spreadsheet.
Right-click on that link and save it to your machine. It adds up your hours, keeps track of what you\'ve done in the last 90 days etc.