Man, you've got some terrible responses in this thread. Here are my slightly more serious suggestions, mostly office products: (i) a GaN charger; (ii) deskmat or a deskspread (Scarters has a nice one); (iii) a tech organizer; (iv) a wireless charging pad; (v) a laptop riser/ stand; or (vi) a good planner/ notebook.
But seriously, name few things which made your life easier?
good for 2 sessions i guess
Some nice tea.