Someone on this Board told us to thread a few needles at a time, and how to do it. Leave your thread attached to the spool and thread a needle, then take another needle and thread it right after the first one - now you have two needles on the spool - keep on threading more needles on that same piece of thread that is still attached to the spool. Now take the cut end of the thread and one needle and pull the thread for as long as you need it - leaving all of the other threaded needles still on your pin cushion. When you're ready for another needle, pull it and the thread, leaving the rest still on the pin cushion.
Maybe everyone already knew this, but I sure didn't. What a great idea!