As you’ll probably know by now, I have a few shopping rules I try and stick to when buying something new. The main one being a 30-day cooling off period; a simple trick but more often than not, it stops me from suffering buyer’s remorse. Generally at the end of the 30 days the item is still available, and if I’m lucky, I might snag it at a discount. But sometimes, I end up missing out on items that have really caught my fancy. Pictured above: Arket Oversized Trench Coat Case in point is this gorgeous short oversized trench jacket…