I've always wished there was more selection out there style wise. I love personalizing my saddle pads, halters etc but I've found few companies that offer what I like.
As for gadgets and routine... Hmm theres lots out there already it will be hard to come up with something new. Gadgets that have been excellent and I love include the EZ Mount, blocker tie ring, bit warmer, peacock stirrups and the gullet attachments that allow you to use a western cinch on an english saddle.
Searching for inventions I came up with this site- lots are pure fantasy lol but one can dream! I love the idea of an automatic bandage roller. What is Your Dream Invention for the Horse Barn?