I probably put a bit more thought into my students' desks than the average high school teacher, but I learned very early on in my career that I despised the time wasted handing things out or going to get supplies - even if there were solid routines in place. So, generally, I try to keep things that students are going to need often within hands reach.
My desks are paired together to facilitate the mountain of pairwork that my students do during class. Each set of desks has a mini-white board for each student, a crayon box of supplies and a pencil bag of supplies.
I use the mini-whiteboards A LOT. We practice both vocabulary and grammar on them. I do a lot of comprehension checks where they get to draw. It's a fun time and an easy formative assessment too!
Inside the crayon boxes are four EXPO markers for using on the mini-whiteboards, a whiteboard eraser to share, and one glue stick for when we get crafty.
Inside the pencil case are two pairs of scissors, which are most commonly used for cutting apart flashcards or vocabulary square puzzles. There are also two pads of Post-It notes, which the students use as their Exit Ticket. I put two pencils in the bag too because I would prefer students just borrow a pencil from there rather than make a big production during class trying to find a pencil. I've also got two pipe cleaners with beads on them that we use for re-telling our TPRS stories. I call them our "Cuentas de cuentos."
What about you? Do you keep any materials close by for students to use? What have you found most important for them to have in your class?