After weaving through various articles and images I've managed to compile together two simple, easy to follow rules that will help in your quest to conquer the supposedly un-conquerable. That is; print clashing- you've either got it or you don't got it and hopefully these rules will ensure that you do got it.
Rule 1 (PART ONE).
- I believe the key is to keep one pattern simple: Don't mix a boisterous top with a exuberant pair of pants.
DO- boisterous paired with non-boisterous ✓
DON'T- Well... you know what they say- a picture says a thousand words
Rule 1 (PART TWO).
- If you do mix crazy patterns, make sure they are either the same colour palette OR a neutral coloured pattern and a bright coloured pattern.
DO- same colour and neutral/bright

DON'T
RULE 2
Match a small print with a large print- that way there is not an overdose of either and your outfit will pull off a wonder juxtoposition.
DO-
DON'T- Not one of Rihanna's finest outfits (and I do love her style)
RULE 3.
Have fun and don't be afraid to experiment- if you want to look like a shamozzle then go for it, no one is here to stop you girlfriend (or boyfriend), especially not me.
DISCLAIMER- These are all my OWN opinions, if you are offended I apologise and you continue to do your thing.