From my book Gregg Speed Building For Colleges c1943
Penmanship. Shorthand penmanship plays an important part in building up your speed... Practice one line a day... After a few weeks devoted to this daily penmanship practice you will be able to read your notes more rapidly and write at a higher speed.
If you want to practice some penmanship drills for Gregg Shorthand, do some of the first few lessons over and over. These are the basics of what you will do for the rest of your life using Gregg Shorthand. Mastering the basics of Gregg shorthand, both theory and writing, you will find the rest easier.
Practice several letters and words in the same fashion as above.
Write it out partially. Practice on section at a time. Write out the outline continuosly, as shown above, to practice getting a flow of the character. Practice it several times. The example plates above only show it once, but write it out several times to get it set in your mind. Check and double check the manual or dictionary for the correct outline as you practice it Try several different words using the same theory.
"Gregg Shorthand had achieved the most extraordinary success ever attained by any system in the history of shorthand." John Robert Gregg, 1922