"Rapidity in shorthand writing depends upon the promptness with which the correct form is conceived or recalled by the brain. It is very obvious that if the student has to memorize long lists of words that must be distinguished arbitrarily—many of such words being written for that purpose contrary to rule—there will be hesitancy in recalling them. When the mind is relieved of that burden, through joined vowels, there is an enormous gain in the promptness with which the forms are recalled and written. "
This book was talking about shorthand systems that don't or rarely use vowels. Which means a word is harder to remember how to write (and transcribe).
I think this also shows that you just can't memorize (or it would be more difficult) a long list of shorthand outlines that goes with words. If for example, you try to memorize every Gregg Shorthand outline that words start with "corr" then you will pause when you hear a "corr" word. If you know that "correct" is an word outline that you want, and is the word you want in a sentence, you will remember it easily. Brief Forms and Phrases would be a slight exception to the rule and maybe an exception all together. But most are based on the principles of Gregg Shorthand alphabet.
Please note this paragraph directly below the one I quoted:
"I believe that in this is to be found the chief reason why so many young writers of Gregg Shorthand, in the speed contests conducted by the National Shorthand Reporters’ Association have surpassed the records made by experienced Pitmanic reporters of more than double their age and experience—records that have never been made, or even approached, by Pitmanic writers of their age or experience. "
Phrasing is a good way to build speed. Once you finished the manual there are other options to learning different phrases (Anniversary even has a phrase book and I think pre-anniversary does as well).
Phrasing will give you speed. If will take two or more words and combine them into one outline. Lifting your pen (or pencil) takes time. If you can keep the pen on the paper, you save time and gain speed.
Learn only the phrases you think you would encounter in your life. You may never use "beyond a reasonable doubt" in your career or even lifetime. So you can ignore those special phrases. Please see the first clink about phrase information on constructing your own phrases, which doesn't guarantee you'll gain speed or be able to transcribe.
Of course remember to hold it as lightly as possible and at least one inch from the tip. Having relaxed fingers and hand will help you with speed. When your hand is cramped you will probably focus more on your hand then the outlines.
If you do end up using a different pen and notebook then one you learned with, that is fine. Working on speed is a learning process, so sticking to the basics (a good pen and a Gregg lined steno book) is the best choice.
3. A sound system of phrasing familiar groups of words
Phrasing does build speed. However, do not invent phrases as you're taking dictation, just for speed. Phrases can look like other words and you will have to transcribe or read it later.
You can invent phrases after you learn the system thoroughly (see #1 above). You can do this for whatever material you're taking dictation about. If you work in the food industry, knowing that vocabulary in shorthand would be first, then see which ones you could combine into phrases.
"Gregg Shorthand had achieved the most extraordinary success ever attained by any system in the history of shorthand." John Robert Gregg, 1922
If you want to build speed but you feel you need to work on a certain speed for a while, do that. However, do not spend too much time staying on a speed just because it's comfortable and you can get most of what you want down in Gregg Shorthand.
You will find that when you build your speed it's easier to write the unknown words. You will write the outlines you know rapidly and when a word comes up you are unfamiliar with, you can allow yourself time to write down the outline and maybe even more fully then you need to.
When you take new, unfamiliar, material, you will find that your shorthand isn't perfect. Let go of the perfectionist. You will get better and become perfect with practice. Just like anything else. You got better at longhand by writing a lot of longhand. You got better at using your mobile phone as more then a phone by using it. Same with shorthand.