Simplify. Your best beers are going to be your simplest: two malts, two hops. Don't overthink it. If an ingredient or technique doesn't have a definable impact, don't bother with it.
The best brewing advice I ever received was to pay close attention to water quality and its mineral content. It may seem like a minor detail, but water makes up the majority of your brew, and its composition can dramatically affect the flavor and overall outcome. I learned that adjusting the mineral profile of the water can enhance specific flavors in the beer, such as boosting hop bitterness or emphasizing malt sweetness, depending on the type of beer being brewed. This advice has significantly impacted my brewing process. By starting to experiment with different water profiles, I noticed a marked improvement in the consistency and quality of my brews. For example, when brewing a pale ale, I adjusted the water to emphasize hop character, and the result was a more vibrant, crisp beer with much clearer hop notes. Paying attention to water has become a cornerstone of my brewing process, and I now view it as just as important as ingredients like malt and yeast.