I used to tie on an individual line each time I left the boat and completely remove and stow it each time I returned. I was noticing that the spacing on the rail clips at the bow was just about the same distance as the distance from the bottom clip to the furling drum. I made up a small line with a small snapshackle at the end. You can see it here clipped (stowed) alongside the pulpit rail.

 

Now when leaving the boat, I can just unsnap from the top clip and clip to the hole in the furling drum. Quick and easy!

Now if I could only remember to unclip it before unfurling the sail for the first time.......