Washi tape is a must have. I use it on EVERY page.

Decorations to add extra elements to your journal pages.

Add some delicate stamping to pages. Choose inks that don't bleed through pages.

Capture the moments with a portable mini printer.

Any good water colors in half pans and in a travel pallet & water brushes. 

For marking a page or holding your planner open for journaling.

Should have been first on the list because can't journal without them! 

Needed for attaching photos and ephemera to your pages.