I have been using tickler files my entire adult life. (I first saw the idea as a little kid--my dad was a one-man law firm and used tickler files religously. I actually used to think he thought up the idea!)
For a while, the tickler file was my entire organizational system. A kept a memo pad in my pocket. I would jot each task to be completed on a different sheet. On a daily basis, I would tear out the used sheets, make decisions on when iI wanted to accomplish them, and drop them in the appropraite files.
If I tasks that repeated, the sheet would include the task and then instructions for when to refile the sheet for when it should pop up again.
For projects, I would take a whole sheet of paper,list all of the steps as best I could, assign a date to each step, and file the sheet for the date the first task needed to be completed. Through the life of the project, that piece of paper would continue to reappear on exactly the day I had planned to complete the next task, and would then disappear until time to do the next one.
I rely on my Palm (synced to Outlook) to keep up with all of the things I used to jot on a memo pad, but the tickler file is still essential for the things that show up as something physical:
1) I plan out a series of inspirational messages for my students (I am a school principal) to read over the intercom to start the day. I get a while bunch of them lined up at one sitting, and then throw then in the tickler file to pop up on the appropriate dates.
2) I buy birthday cards for the whole year at one time. At one sitting, I address them all, put on all of the return address stickers, and (in the spot where I will later stick the stamp) pencil in the date the card needs to go in the mail. I sort them all into the tickler file and forget about them. Each card pops up on the day it needs to be mailed.
3) As bills come in during the week, they get thrown into Saturday's file. On Saturday, there they all are, and we handle them all at one time.
These are just three examples of using tickler files to "batch" similar items. I could go on for days. For the past half a dozen or so years, I have been doing workshops on time management and organization for educators around Alabama. Particpants I run into months (or years) later keep pointing to the tickler file as the thing that made the biggest change in their lives.
Frank