Using the Anniversary manual (the little brown one), you can do this. If you need the free online version, please see the Angel Fishy site here.
There are 36 units. That's 1.69 per day. Use the first day to read the Preface, etc., up to Unit 1 (but not unit 1). Review the alphabet and letters a few times. Since there's some variety in Gregg Shorthand, don't worry about perfecting each letter, just read them over.
The easiest way to accomplish every unit is to choose one of your non-busy days to learn only ONE unit. The other days you can do one over two days. The one unit a day could be a Saturday or Sunday or any day you have more time in.
If you are ambitious and want to try this in a month, check out the Learn in a Month Lesson Plan. But remember, you can learn it as fast or as slow as you need to.
Most lessons are two days. There are a few that are one day. I choose a weekend day for most single day lessons as people have those days off, but you are welcome to change them up as needed. I used the one month as a guide with the "easier" units as the single day (these were combined with other units in the one month lesson plan).
The first day of the duplicate lessons: 1. Read the entire unit through. 2. Transcribe the ""reading and writing"" section from the textbook.
On second day and single day lessons: 1. Read the entire unit through. 2. Write the brief forms and phrases, also the ""reading and writing"" section. You can choose to write the theory if needed. 3. If you have recordings (or made some) of the current unit, take dictation. 4. Transcribe your notes from the unit as well as any dictation you may have.
Additional homework (if you have time): 1. Dictation from any recordings you have of the unit or previous units. 2. Transcribe any notes or from the textbook again of the current or previous units. 3. Make and use flash cards of the brief forms or just rewrite the brief forms and phrases.
Review: On the last day of the month, reread the manual or review any principles you need.
For anyone who wants to try this year challenge (last year it was suggested here in the poll). Here is a simple plan. I made it even easier. You just write the lesson, transcribe what you wrote and/or your dictation, then take any dictation you may have. You can get the transcript from the link above and use any app that will record your voice (there are even little devices if you don't have some program).