My average typing speed is ~120wpm, my best is 165 and I'm slowly working towards 175. A lot of typing feels intangible to me, but I do think a lot about what I'm doing, so maybe I can offer a bit of advice:
First, I think that typing generally comes down to two things:
1. Simply knowing where the keys are in relation to each other (which just takes time... I can press any key on the keyboard faster than I can think about where it is).
2. Given the sequence of words you're going to be typing, positioning your hand/fingers in a way so that all of the keys fall under your fingers with as little movement necessary as possible. Eventually your fingers start getting so fast that, more often than not, the problem isn't your inability to go "faster", it's that your fingers get in the way of each other. This takes forethought in addition to planning... I don't sit down and think about it, but as I'm typing, I'm constantly thinking about how it felt to type a word. If it felt bad, I change it up next time. It's all about optimizing your hand shapes so that this stuff happens as fluidly and with as little stuttering as possible, and this gets more important as you begin typing faster.
But anyhow, some other things:
1. Accuracy is important. I typically cruise along at ~155... and then make a single mistake, have to stop typing to whack the back key, and this costs me 10-15 wpm. In that one half-second it took me to delete one character, I missed the opportunity to type 8 or 10 more.
2. So, don't always type at the same speed. Some parts of the passage are trickier than others, and other parts of the passage just are naturally more conducive to being typed than others. I slow down a bit on the trickier bits and speed up a bit on the easier bits. I find that if I don't slow down I'm more likely to make a mistake, having to stop to hit the delete button, which, again, will immediately tank your score.
3. Get comfortable using all of your fingers. I often use my right pinky for periods, for example. Or for the word "phrase": my right pinky is on P, right index finger on H, left index finger on R, left pinky on A, left ring finger on S, left middle finger on E. Now, that's the ideal position for me, but in the context of a sentence, it's not often that my hands will be perfectly positioned to let the word fall under my fingers like that. But generally speaking, the more of your fingers you're comfortable using, the more you can plan ahead and create optimal positions for yourself.
4. Think not only about where you are now, but where you're going, and what fingers/hand shape you should be using to type this word so that you can most efficiently transition into the next one.
5. I also play piano, and I implement a lot of piano technique into my typing. For an example of what I mean by "hand position", see this video about "blocking" out passages of Chopin's Etude Op. 10 No. 1:
https://www.youtube… , or this one:
https://www.youtube… . Whichever one you watch, pay attention to how intentionally they're placing their hands... because of how they've placed their hands, there isn't any awkward turning or reaching. Their fingers just happen to be right where they need to be to hit the note, and that's what I shoot for when typing, too.
6. When you're going quickly in such a small space, efficiency of movement is important. I do my best to minimize finger movement and avoid my fingers "flying up" when moving to press a key -- like he talks about in this video on piano technique:
https://www.youtube…7. Posture is important. I sit up and root myself with my feet on the floor, lean forward a bit into the keyboard, and position the keyboard about 8 inches? or so from the edge of the desk (just what feels comfortable to me).
8. Lift your forearms a bit, so that they're equal to or slightly higher than your fingers. This bit of height lets your fingers sort of "dance around" the keyboard, rather than you having to pick them up with your hand muscles and drag them here and there.
9. It's not really that big of a deal, bit when you're breathing, your chest rises and falls. This causes your forearms to rise and fall a bit, too, and sometimes that's enough to throw my rhythm off. If I'm really focusing, I take a big breath, then breathe out, begin typing at the end of the out breath, and hold my breath for the passage.
10. You don't have to begin typing right away. When I come to a passage, I take a few seconds to skim through it, in particular the first four or five words. I very intentionally place my hands so that they're in as optimal a position as possible to type that unique phrase.
