@bodhipaksa I don't! Worst signing *ever* came to my front door—a crate of 1000 frontispieces to sign so they could be bound into a limited edition. Took a couple of days. The only way I could get through it was to mutter "one pound … one pound … one pound …" every time I picked up a new sheet (that's about what it paid above the basic royalty on SRP for a hardcover).
Writing lines used to be a punishment at school. Now it's part of the day job.