Thankfully with the wonders of the googlewebs, we have all sorts of tools at our disposal! One of the best examples I've seen so far is The World Building Academy. Okay, it's not an actual academy where you have to sign up. But it's a series of detailed articles meticulously built to assist game makers and writers to make believable and fleshed out worlds. The author of the page, Deborah Teramis Christian, has devoted a great deal of time and effort to helping us all and has been doing a dazzling job.
Have you ever thought of the logistics of keeping a rural road in working order in a fantasy setting? Or how disease effects a community or region? What about guilds approving you to work in their village? She certainly has!
I highly recommend looking at the Academy and the articles, and even the books if you're serious about world building. It's darned fun and stretches your brain muscles. So go ahead and take a look! :)