Swivels: barrel, snap links, quick change links
Bait stops: where grass is not good enough - spaghetti, the coloured stops that look like corn etc., quick stops; Korum or Drennan with their pusher tool in various colours and sizes
Baiting needles: Long, short, latching (and, as above, pusher tool for quick stops)
Leads: or weights of various shapes sizes
PVA: with funnel tubing - some use bags which have been improved recently so don't discount the idea if you have a bad time with it before
Bait: tinned meat, maggots, particles, bread and maybe boilies (a complete minefield in and of itself) depending on where you are fishing; keep it simple location is still number one requirement
Practice at home tying the rigs: A metaphorical one really but still needed