My Favorite Tweaks, What is yours?

Kinetics.Anti-Static (Tiger Cloth)

Not what I traditionally describe as a tweek, but most helpful and highly effective tool in your lp cleaning ritual. I no longer use a brush of any kind.

, for clean records.

Paying attention to all the details.  Simple things like is the turntable level?  Are the speakers in phase?  Is everything properly grounded?  Set up is everything.  Don't just consider the little things like the wires, the cartridge, or the isolation devices, the elephant is...the room itself.  And don't forget that furniture matters.  Leather reflects, textiles absorb, a carefully placed bookshelf can be a great aid to acoustics, but a big coffee table in the wrong place can really screw up the sound stage.  Like I said, pay attention to all the details.  It doesn't hurt to have a sympathetic significant other.

@996turbo911 beat me to it.

My B&W 803D3 had sounded a bit bright. The manual says to setup an equilateral triangle with the faces aimed at the listening seat (toed-in).

I rotated them so their faces aimed straight ahead.

Voila! Worked like a charm. Highs were softened, and an added benefit was the soundstage sounded wider. Winner winner chicken dinner.

For vinyl spinners: Tiger Cloth. Recommended by @antinn..... An Anti-static Microfiber cloth. The brand I use is Kinetronics. I no longer use a record brush in my regimen.

ISO-PUCKS mini + iFI Silent Power supply for my Qutest dac. Best $200 I’ve spent in a long time to improve my SQ.  No other tweaks in my system.