Income was a key theme for the year across shares, investment trusts and fundsShort-term bonds were particularly popular It’s that time of the year. Everybody is looking back and taking 'stock' of what they have done, and what they need to change for the year ahead.Investors are no exception, and in December brokers handily publish lists of the most popular investments among their customers over the year. Investors' Chronicle has compiled the lists and here's what we found out. Stocks and sharesThe list of top-10 most popular stocks on Hargreaves...