If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
Plan A: Change your environment; spend three hours a day preparing a proposal for management/ownership to work as a contractor paid by entry opposed to an employee paid by the hour. Find the relevant tax and overhead savings to make this a mutually beneficial arrangement. Find out who in management/ownership can approve your proposal and who it just creates headaches for, buy beer for both.
I understand that goes against the spirit of your question, that your work environment may be to rigid, management that could approve the proposal are out of reach of the data entry staff, or one of many other arguments, but 60 hours a month is a large amount of time, it is shocking what could be done.
Plan B: Now on to things I've actually done in that situation; spend 60 hours preparing a bulletproof argument/presentation for a raise, spend 60 hours learning how to create better resumes, spend 60 hours learning how to job hunt without a resume (handshakes and recommendations), spend 60 hours job hunting, and last on the list spend the time on entertainment so that you are mentally recharged to make the most of your personal time.