How to improve IP lookup accuracy for geo-targeting?

Hi everyone, I'm completely new to the world of geo-targeting for my SaaS, and I've been reading through the previous thread about intermittent geo-targeting accuracy discrepancies. It's been really insightful but also a bit daunting for a beginner like me. My small SaaS really relies on accurate geo-targeting to deliver region-specific content and features, so ensuring good IP lookup accuracy from the very beginning is a huge concern for me. I'm trying to figure out the best way to get this right from the start.

I'd be incredibly grateful for any practical advice or best practices you seasoned pros might have to improve and maintain IP lookup accuracy, especially when integrating with services like Cloudflare and various third-party IP Geolocation APIs. What are some recommended APIs that offer better location accuracy, or common mistakes I should absolutely avoid when setting this up? Are there any good methods or tools for validating the geolocation data I receive to ensure its reliability? Thanks in advance!