A bit late, I use many of social networks (fb, g+, twitter) and syndication. The one you missed (IMHO) is StackOverflow, many users here use to point to them, not the best place to find some help (specially because some annoying moderators), but, I think it is one of many places to go when need some help on general programming topics. On Google+ there is a very good group of Delphi developers.