Understand what a 'spike' is: a deep and focused passion in one area.

Use platforms like Coursera or edX to take college-level courses in your area of interest.

Start a blog, podcast, or YouTube channel to showcase your expertise and build a portfolio.

Participate in online competitions or hackathons related to your niche.

Use platforms like Codecademy or freeCodeCamp to become proficient in a specific coding language.

Launch a non-profit or community project using online fundraising and organizing tools.

Become a certified expert in a specific software, like Adobe Photoshop or Google Analytics.

Use online research databases to conduct independent research and write a paper.

Network with professionals in your field of interest on LinkedIn or other platforms.

Demonstrate to colleges that your interest is more than a hobby; it's a passion you've actively pursued.