Travel Checklist
My travel prep stress has decreased markedly since I developed a checklist for academic conference travel. It contains a few things I need to do (charge everything, back up my computer, make sure I have alternate access to talk slides) and checklists for the things that need to be in each of my containers.
I continually refine it - often writing new things while preparing for a particular trip, then adding them to the master document later - but it really helps.
If you want to see it, get it from OneDrive or as a PDF.