One thing I have noticed here. There are regular request along the lines of "Please recommend good books on electrical engineering/ mechanics / toffee making / bonsai....?" How about a series of short(ish) bibliographies, with a list of important books and a short paragraph about each to help choice. These could be placed in the learning materials section or anywhere easily identifiable. Everyone could then point to them when such questions arise rather than continually reinventing the wheel. I would be prepared to kick off by preparing one on stress analysis for consideration.