Ball-Pythons.net (Forum) — Their BP Husbandry forum hosts a long list of extremely useful “sticky” threads. I recommend giving these a read-through when you have a chance.
Not Just a Pet Rock (Facebook) — The BEST ball python Facebook group ever (and believe me, I’ve done my time with Ball Python Enthusiasts). This is more than just bare-bones ball python husbandry. This group operates on the belief that ball pythons are more than the timid pet rocks that most people claim them to be. Husbandry advice is based on wild habitats and behaviors rather than what’s convenient for the humans.
Where My Scales Slither — Tumblr account devoted to captive ball python care. Excellent, thorough information on many ball python care-related topics, complete with tutorials and images.