How Do You Spot Issues Before They Become Big Problems?

I've been doing some DIY repairs around the house lately, and honestly, I'm not exactly a pro at noticing when something's about to go wrong. Like, last week I totally missed a leak under the sink until it was practically a mini flood, you know? So I'm wondering if anyone has some good pointers or tricks for catching small issues early - stuff that's easy to overlook but can save you a headache later.