Short and sweet:
1. Silverwastes can be a very good way to get gold and mats. This guide on reddit should help explain the mechanics:
http://www.reddit.com/r/Guildwars2/comments/2tgy37/essential_guide_to_the_silverwastes/cnyy51s
2. Dungeons are a great way to quickly earn gold. Not much there has changed.
3. For build suggestions, I usually turn to:
http://metabattle.com/wiki/MetaBattle_Wiki or
http://intothemists.com/
Hope that helps!