From my experience, achieving a perfectly peaked sourdough starter is truly the foundation of great bread baking. When your starter reaches that peak—meaning it’s risen fully and is bubbly throughout—it signals that the natural yeast and bacteria are fully active and ready to work their magic. One helpful tip I've learned is to keep your starter in a warm, consistent environment, ideally around 75°F (24°C), as temperature greatly influences fermentation speed and activity. Feeding schedule is another critical factor. I typically feed my starter every 12 hours during active growth stages, using equal parts flour and water by weight, which helps maintain balance. It's important to use unchlorinated water and a flour type with good nutrient content, such as whole wheat or rye, especially when building the starter from scratch. Practicing patience is key—sometimes the starter takes a few days or even up to a week to become reliably bubbly and show a pronounced peak. Watching the timing before the peak occurs also guides me on when to use the starter; a perfectly peaked starter provides the best rise and flavor in the dough. For beginners, I recommend marking the starter jar with the current level after feeding so you can easily observe the growth over time. Using this visual cue helps prevent using the starter too early or too late. Remember, each starter develops its own unique characteristics influenced by your local environment, so embracing gentle experimentation is part of the rewarding sourdough journey.