I always play in my head the progression Min-Sus4-Min-Sus2 and compare the chord to the progresson.
I always use the Song Tangerine from Led Zeppelin as a reference. There it is used near the start of the song right after the count off.

Focus on the lowest note. If the next one is a tone away, it's a sus2, otherwise a sus4!

This is a great video that helped me. Listen to it over and over.

Also having a reference song that you're super familiar with helps a lot. for example, Bon Jovi's Livin' on a prayer intro pad is my sus4 reference.

A sus4 sound will want to resolve down to the major / minor 3rd, while a sus2 sound will want to resolve up to the major / minor 3rd or down to the root. So try to single out those notes and see if it wants to do either of those things.

With a sus4, try to imagine the 'A-men' finish to a choir song, where the 'A' part is the sus 4 sound and the 'men' the major 3rd resolution.

Wow, that video is brilliant. Exactly what I need ! Thanks @Sammy D

Thanks for the great tips, everybody! Very helpful. I've got Pinball Wizard by the WHO for Sus4, but somehow the Sus2 keeps tripping me up, and I end up substituting it instead. Just a matter of practice, practice, practice I suppose.

A good iconic example of Sus2 would be the very last chord in the synth progression that conforms the chorus in 'Jump' by Van Halen.

This case is very illustrative of Sus2 replacing the V chord at the end of a cadence. On the other hand, Sus4 sounds to me like a fitting substitute for a IV chord.

I recommend associating that synth Sus2 with the image of David Lee Roth in spandex performing some gymnastic move on stage: that's hard to forget! 😅

Haha! Now I can't get that picture of David Lee Roth out of my mind, @Cuantas Vacas ! 😂

See? It actually works!!👌

@Karyn Ellis yeah, the two have the same sonic flavor. What I used to do was I'd arpeggiate a sus2 & a sus4 in my head (with the same root as chord the game was playing) and whichever sounded more like the game's one was the one I'd chose. Then gradually I didn't need this crutch anymore. I still use it if I'm unsure, though. @Cuantas Vacas I watched the original video for Jump and was surprised at how high up Alex's hihat was! doesn't look comfortable at all. Also surprised that there are hardly any shots of anyone playing the synth part

Good point, @Francisco Albisua ! A drumkit is the most customizable instrument you can find, and even in its most basic setup every element's position, size, height, tilt, tuning, etc. can be modified to fit any drummer's preferences...and sometimes you can find extreme cases like Alex's hihats! As a former drummer, I'll dare to say that, despite what it looks like, he liked its hats that way!

As for the famous synth, Eddie was credited with both composition and performance. I think I remember a couple of shots of him playing the synth solo, and his 'technique' on keys seems to me a little clumsy, specially compared to the way he moves his hands over the strings...but anyway he smiles.

his smile is almost as legendary as his solo on Beat It! Which I recently learned he recorded without telling his band mates, hoping they'd never find out he had betrayed them. I guess he never thought that Michael Jackson fellow would go anywhere 😂 also, Eddie, who else could've play a solo like that in the 80s? What were you thinking? 😂

Many borders were happily crossed in that era...