To be clear, I worry as much about the impact of the Internet as anyone else. I worry about shortening attention spans, the physical cost of sedentary 'surfing' and the potential for coarsening discourse as millions of web pages compete for attention by appealing to our base instincts.
Low levels of vitamin D in the population as a whole suggest that most people need to take a vitamin D supplement. This may be especially true for seniors, as the ability to synthesize vitamin D in the skin declines with age.
Anyone who knows me will attest that at any time during the day, you are most likely to find me picking tayberries, 'deadheading' peppermint, or succession-planting shallots. There is almost nothing, really, that I would rather do.