I got a battery-powered air blower after seeing a YouTube video comparing and reviewing them.
I've always joked about how stupid leaf blower are, but I've found this pocket-sized version really useful.
Cleaning out dust from computers, tower fans, etc, it is amazing.
I also have a small dust buster and this blower gets its filter really clean like nothing else can.
Unlike cans of compressed gas, there's no concern about inhaling anything if I use it indoors, or getting frostbite when the can cools.