"must have" accessories for TT and LP?

All great suggestions. Let me add: a can of compressed air for blowing away loose dust and an end of record lift device like the Expressimo Lift.

1) The "HiFi" mod made by TWL, depending of course on what kind of arm you have.
2) A good record cleaner, and lots of good LPs.
3) Make sure you have a stable platform for your TT.

All of the above + Dennesen Geometric Soundtracktor and an Oracle Calibrator.

I love my Expressimo Lift and Heavy weight on my RB300.
The Wallytractor was the easiest set up tool I've seen.
Love the Hunt EDA brush for quick touch ups of clean vinyl.

You need a good car for mad dashes to used vinyl sites. I prefer a Saab 93 Convertible, you can also use it to dry records after using the Alsop Orbitrac. (Gotta watch for dusty roads however.)

1. DB Systems Protractor
2. Access to a good tracking force gauge like Winds.( If you have friends who listen to LP's chip in for one)
3. A good stiff bristle brush for deep cleaning and a softer one for general cleaning (fluids to match)A stylus brush.
4. Good aftermarket record sleeves to replace the paper and plastic ones your LP's came in.
5. A marginal understanding of VTA(SRA), azimuth, cartridge alignment and tracking force effects on sound and a copy of the Cardas Sweep or HI-Fi News record.
6. Time to listen and enjoy. You can always tweak it later.