I think I've done more world-building than I have actual writing on my story this past month. Although in doing so, I have something that ties in better with where the plot has been going recently. And I think one of the characters that was supposed to be an antagonist (or at least working with the main villain for this story) is starting to come around the the MC's side. Mostly because he was nearly killed by the villain or happened upon the villain betray some who were supposed to be allies (to the villain). Now the supposed-to-be antagonist is starting to question his mission.
I supported a Kickstarter campaign to fund a world-building/story prompt tool for gamers and writers, called The Deck of Worlds. It helps with creating landscapes and location prompts. I went all out and got the expansion for the Story Engine Deck as well, which was the first tool/kit from the creator. I liked the Story Engine Deck since it did help with ideas for characters, especially the minor/secondary characters. But the Deck of Worlds also included some prompts for story ideas in general, which I think will be helpful, as well as some lore and flourish cards to help flesh out the world. Didn't get a chance to really 'play' with it yet but I'm looking forward to it.