My spreadsheet has the following columns...
Card Type (i.e. Visa, MasterCard, etc.)
Name (Hyatt, Sapphire Preferred, etc.)
Bank (Chase, Citi, etc.)
Account Number (last four digits)
Credit Limit
Due Date (which day of the month)
Owner (me or Gooch)
Annual Fee (month it is due)
Apply Date
Then I have a column for each month to check off that I paid it that month.
Also I have a separate tab for closed accounts which has the additional column of Cancel Date.