1) omnifocus inbox
2) iphone photo, when I find an action in iphone, I just press POWER+HOME button to capture it to photo album
3) gmail inbox, when an email will be processed, I put it inbox, don't archive.
4) cloud disk, I use kingsoft fast disk, I usually sync some files between office and home, between Windows and Mac
5) windows desktop inbox directory, when I receive someone's file, I put it there firstly