I find the most common mistake that I make is having my thumb on the space bar and sometimes I press it down without realising and what not.
Other mistakes I make are that of moving to the next key stroke because I think that I've pressed that key, so for example if i'm spelling example, sometimes it would come out like exampel type thing, but that's just me being too eager.
I think reds are also a subject of their keyboard, like I've got a Noppoo choc mini and I've also used the Filco TKL and the filco reds, while they are the same switch, it felt like they were a better version of reds because of the build quality of the filco in comparison to the Noppoo. (I wish the noppoo had a backplate /sadface)
[/quote]
I can tell you what I did with my keyboard, it may help you with the space-bar issue. I prefer elevation under the back of my keybaord, but I don't use the keyboard's legs. I use self-stick felt pads I pick up from Home Depot, Lowe's, or a hardware store. I place two columns of three stacked pads at either end of the keyboard. I find the pitch allows my hands to float freely over the keys; and my thumbs, because of the pitch, rest gently on the space bar. So I never have accidental space-bar strikes. When it comes to elevation, preferences will vary; and some like a flat keyboard. For me, I find the elevation works.
I also have miscues when typing; but it's because I'm typing faster than I should. I know the best way to type is with a tempo, fast or slow, but when we're trying to keep up with our thoughts, it's easy to forget about form and focus only on getting one's prose on the screen.