obvious answer is to push until failure and go agane

more convoluted answer is to see if your tapping technique is sustainable for specific bpm ranges or if you need to change it up a bit (i lift my wrist on 250+ as an example), if not you have to change it according to your needs/genetics, if you think you can push it then its a matter of figuring out your tension, if any, across your entire tapping hand, the forearm is the safest part to tank most tension, but you actually want to balance it out throughout too, fingers, wrist, back of palm, biceps, even shoulder, and then the stamina part is where you push bpms until failure, you can maybe use long stream practice but you're better playing actual maps or the segmented bursty stream maps by ckopoctb/evth, riot1113, seamob, since you're sharing your energy between your aim and tapping hand 50/50 vs 95/5 by aiming a square for 3 minutes, after a while the amount of tensing you have with any part of your arm should lessen once you get used to the bpm, or if you're a player like me that plays pretty periodically, just needs a few hours of warmup and then you're back to where you were

these are called "atom photovoltaic glass" mousepads on aliexpress or in my country, from shopee/lazada/tiktok shop, they have a non-standard texture (if you look closely there's miniscule tiny indents) vs all the other glass pads you see in the market which are just flat surfaces i think and thus require you to wear an arm sleeve, i dont need one for this though, sweat and grime actually makes the glass easier to the skin lol, if i were to clean the mousepad fully clean with alcohol, my arms would stick way worse compared to getting sweat and grease in, anyways the mousepad costed me around $18 at the time, the skates i have are xraypad obsidian clones, the red ones, also bought from aliexpress or the other sites for like $0.5 a pack

there's layers to this both as a question and an answer

consistent in tapping? my tapping technique has been practiced for months and years now and i know how to vary it depending on the bpm/stamina required

consistent in stamina? a lot of warmup pushing myself to failure on bpms and i have a failsafe on top of a failsafe with my technique (see my we luv lama liveplay, i should upload my ranked set fc which shows it better)

consistent in flow aim/tracking? reading isn't a problem usually, but i will struggle sometimes with knowing how much to move for a spacing change/accel decel streams, i will fail a lot so i look at the failed replays in rewind and gauge my mouse for the next play, but for only starting to get better at it, NF some stream maps, i used to play tenkai e no kippu, reason, ascension to heaven (old kroytz set)