Dealing with forum spam can feel like a never-ending battle, but I've picked up a few tricks over the years that've made a significant difference. My primary approach has always been to employ multiple defenses simultaneously. I always include tough CAPTCHA challenges when people sign up and when they post, and I also have strict moderation queues for new users and any posts that contain links. One approach that has been surprisingly effective is the use of honeypot traps. These are hidden fields on registration forms that only bots would try to fill out, and they catch automated spammers without bothering real users. I'm also a big believer in letting the community help out; empowering trusted members to flag suspicious activity gives you an extra set of eyes. And finally, it's crucial to keep your anti-spam plugins and modules up to date and properly configured, as spammers continually find new ways to bypass them.