Forgot my mobile!

When I went out this morning I forgot to bring my mobile phone which made me think, driving along, what would I do if I had an accident or needed to get in touch with someone. Nowhere in my brain is a telephone index, I would not know a single number to call as they were all in the memory of the mobile. We certainly do depend on our electronic gadgets now but am still going to keep my paper telephone book, just in case. T