Every xNTP in school should be working on developing and implementing a startup idea, even if not planning on going the distance.
Market finding, product development, marketing, sales, branding, personal selling, interacting with customers, reading books, improving awareness and education, improving appearance/aesthetics, health and fitness, fixing nutrient/hormone deficiencies, sleeping well, planning more efficient day, applying all learnings, potentially avoiding the rat race due to product success, a changed mindset upon graduating, an incubator period before it's showtime, attracting and retaining talent, biasing superfluous attention toward future success/security, partnering, avoiding embezzlement and theft, positioning, supplements/nootropics that increase motivation and stamina, iodine protocol, having a reason to wake up each morning, stringing yourself along with an endless list of reasons, packing schedule with relevant meaningful activities/actions, getting in the habit of not having others waste your time, so much drive and things to be interested you forget about sleeping, having things on mind even when doing something else keeps it buzzing/scanning/processing, thinking of or finding the next idea, stringing them along, becoming familiar to the point you don't think about the details of business/product creation, managing finances, presentation skills, nootropics/supplements that help with presentation, being able to improve and tailor appearance, automation/systematization/delegation, learning how to program (even if not planning on being software engineer), more perceptive eyes, etc..