No gimmicks. These are the fundamentals that actually work.
This is the single most important tip. Every backspace costs you the keystroke, the correction, and your rhythm. Slow down until you can type a full test at 97%+ accuracy, then let speed come on its own. Net WPM rewards clean typing; sloppy speed doesn't survive the math.
Fingers rest on ASDF JKL, thumbs on space. Each finger owns its column of keys and returns home after every stroke. If you currently type with two index fingers, expect a week or two of feeling slower. That's the investment; the payoff is permanent.
Looking down breaks your flow and trains your eyes, not your fingers. Cover your hands with a towel if you have to. It feels awful for a few days, then your fingers learn where everything is and you never go back.
Feet flat, back supported, screen at eye level, wrists straight and floating above the keys rather than resting on the desk edge. Discomfort makes you tense, and tension makes you slow.
Ten focused minutes a day beats a two-hour weekend cram. Typing speed is motor memory, and motor memory is built by repetition with rest in between. Take a KeyK test once a day and watch the trend, not any single score.
Drills teach key positions; real text teaches word patterns. Your fingers eventually learn common letter combinations (th, ing, tion) as single motions. That's where big speed gains hide.
Watching the number tick up makes you rush and watching it stall makes you tense. Look at the words, not the score. Check your result when the timer ends.