Uff! You're so awesome, guys. But I'm not really satisfied with those tips. Mmh... How about by giving an example of the techniques you use.
There are several types of action scenes - fight scenes, chase scenes, race scenes (for sports), disaster scenes (e.g. earthquakes), heist scenes. So it depends on what you want tips on because every type needs a slightly different approach.
In my novella, I've done a scene where a heist goes wrong in public (on a livestream reality show to millions of viewers, no less) and used a mix of short sentences, longer sentences broken up into several short clauses with nearly every clause had an impact verb, e.g. "punched", "shrieked", "struggled", "gasped", "kicked", "snatched".
The tussle that broke out between my MC (a kitsune who was conducting the heist) and the mark (a corrupt banshee who was wearing the artifact the MC was supposed to steal) was partly based on my memories of my messy, grabby fights with my sister when we were kids. Girls and women fight differently from boys and men - lots more hair-pulling and snatching at the opponent's jewelry and clothing, chasing about, and screaming insults at each other for example.
We also follow the MC's thoughts as she struggles to get hold of the artifact, helped along by her heist partner (the tech expert) whose increasingly frantic instructions and feedback via an mic/earpiece in the MC's earring also kept the pace moving fast.
I also made sure the audience reaction and the general chaos that erupted were depicted in a very visual manner in order to heighten the tension and kinetic feel of the scene.
But then, this is how
I wrote it (and it worked - everyone who has ever read that scene enjoyed it immensely). Someone else might write a heist action scene very differently, using other methods and techniques.
Other tips:
1. Using action scenes from more visual storytelling forms for inspiration (and taking notes)
In a different WIP, I wrote a food fight that takes its inspiration from a fight scene in Jet Li's ONCE UPON A TIME IN CHINA where Wong Fei-Hung (the legendary martial arts master) tries to prevent a powder-keg situation between the Chinese and the British from blowing up by personally stepping into a free-for-all group fight between different local martial arts guilds in a British tearoom in Shanghai - he literally uses his fighting skills to break up and STOP every fight. I watched the scene, took notes on the beats of the action and wrote down a list of actions, verbs etc, then worked it into the DNA of the set-up of my scene (a pacifist Reaper using his superb fighting skills to break up a food fight between a large group of various supernaturals).
Other visual forms might include comics/graphic novels, live stage action, animated movies, and paintings.
2. Literally learning and mastering the form of action in real life
I know
@Juliana took up sword-fighting so that she could have a first-hand feel for that sort of fight scene (and it has paid off in spades - her sword-fighting scenes are excellent).
3. Learning by watching YouTube videos
Plenty of folks watch YouTube videos of various martial arts styles etc to see how it's done. I'm watching car chase scenes and parkour/free-running on YouTube because the novella I'm currently writing is a road trip with lots of car chases and my little kitsune chasing after or being chased after on foot a lot.
4. Knowing your characters and their motivations... and how they respond to potential violence triggers
You'll need to know your characters VERY well and what traits of theirs can be weaponised or deployed in a fight or chase or race etc. That would in turn dictate what the fight would be like, what you can use to ramp up the tension etc.
For example:
John Wick - Some idiot macho greenhorn gangsters dragged him out of retirement by killing the puppy his late wife gifted to him and thus interrupted his mourning period over her death from cancer. Since he happens to be the baddest-of-the-bad hitman with a superhuman affinity for guns in that 'verse, we get a revenge drama with a ton of gun-fu and non-stop over-the-top violence.
My little kitsune - She's a fox burglar who doesn't like physical confrontations with anybody. She'd rather sneak about getting her jobs done in stealth. However, when her hand is forced, she uses her talent for generating directed chaos around her in order to distract/infuriate/occupy other people while she does what she wants to do. And if she has no other choice, she uses all the attributes she is born with that can be used in a fight - her retractable claws, her perternatural agility (so in chases she does parkour/free-running instead of just legging it like normal people), her tails (for maximum whump-in-the-face impact), and her talent for unpredictability and improvising on the fly.
Hope this helps.