Rank the tweaks, geeks!

I’ll leave it at there is only two things on that list I have not bothered to dabble with (risers and caps) and one I dabbled with that turned out to not be worth it (fuses).  Also dabbling with fuses can cause damage if not done properly. 

I let my vendor choose the caps just like all the other stuff they choose to put in there.

if I had to pick the most important key ones it would be isolation of components in general though even there YMMV.

Also I would add if one is smart about it none of those things need cost a fortune.

@ebm If you can take a few minutes to write blather, you can take a bit more time to contribute something you know of substance. Then again there's the usual option: take zero time and just skip the thread. Oh, yes -- have a nice day. 

Perhaps the most notable was "component isolation". I was a skeptic of most tweaks, etc, like most people start off. It’s just hard to believe that some of this stuff works. Many years back I read  about pumice stone under a CD player @ TNT audio(?). I hate guessing about something. The tweak was $3 worth of Pumice stone from a dept. store. OK, That’s cheap enough. So lefts try it. I bought 2 pumice stones and cut each in half. My mind was telling me that I could put an end to this ridiculous idea by disproving it. So, under the cdp it goes and...........................................................WHAT? Huh? It didn’t take long and I was hearing a bigger soundstage, and more air. The music floats on air rather than being cast or shot out from the speakers. (Hey, I ain’t no reviewer. I don’t know the fancy words to describe it. Said another way, "It sounded noticeably different and better.. From there I found a recipe for DIY roller blocks. These are even better.
From there I moved up the $$$$ scale to an Oyaide R1 power outlet @ $175. I felt really foolish spending my $$$ on this with NO $$$ back return offered. When I heard the difference IT made, I felt like someone was playing tricks on me. How could this be? I hate things which don’t make sense to me

oregonpapa has a nice summary. Townshend springs, HFT, ECT, PHT, cable elevators have all made a huge difference. Haven’t yet tried fuses, tube dampers, or PPT. Those tweaks are on the agenda.

Definitely it's getting the room and speaker placement correct, best using a laser tool. Then isolation of components especially a TT if you're into vinyl or your CDP/transport. From there power is next like receptacles. Then just too many others but get the foundation right and things will fall into a happy and enjoyable listening experience.