Always earrings (I have a 2+1)
I wear silver and gold meh my wedding ring is a 2mm heavy court so I layer it up
Bags and shoes must be black or brown not mixed. In summer I have grey which I wear with my Converse.
No leather , fabric or faux.
No double animal (I do like an animal print but it needs to be only one and definately not two different types)
No white linen see through trousers (FFS put your arse away luv 
No labels for the sake of it.
Trousers need to be proper length , no mid calf or scraping the floor.
No heels and trousers unless they're shoe-boots (I'm ancient, heeled shoes and trousers was considered a 'poor' look in my day)
I only ever wear shoes I can drive in or run in (if I ever chose to run which is unlikely) but I wouldn't let my shoes hamper a get away or catching a bus .
Patterns always look their price. Stripes and checks must match up. Though I love paisley.
And my pet hate is people buying something just because it's cheap/cheaper.If it's something I've looked for before and I see it in a sale then Yes! But when I hear people say "Oh it's only £5" , it's £5 wasted.
And I never buy something when I'm feeling bad. I know it cheers people up, retail therapy , but it will just remind me of the time I felt shitty. 