Never bring a gun to a fight where the other guy has a time-machine and tomorrow's newspapers.
All gone. Zelazny was one of the first times I looked at something I had had familiarity with to find the spot where the memory should have been empty, replaced by a scrawled Moved South for the Fishing sign. Calculus was another loss. It was quite upsetting to reach for a skill and find nothing.
The number of times I have been declared dead is statistically insignificant,although admittedly non-zero.