I do love a pound shop (Poundland only, none of your Pound World rubbish - a man's gotta have a code).
Usually stock up on Arm & Hammer toothpaste, Aquafresh alcohol free mouthwash, batteries and Original Source hand soap.
Will usually peruse the CD/DVD section too. CDs often have some mid 00s/Britpop entertainment that I will stick in the car - from memory have picked up Goldie Lookin' Chains' Greatest Hits, the Dubstar album, Wake Up Boo and Free The Bees earlier this year. Can occasionally pick up some top notch horror flicks on DVD too (have nabbed Absentia, Pontypool, Spring, Cheap Thrills in the past).
Also, Halloween tat