There are two main ways to search for internships: online and networking. Online methods include using BU CareerLink to view opportunities posted by companies recruiting on campus, searching internship listings, and checking web resources. Networking involves attending company information sessions, conducting informational interviews, and connecting with BU alumni and students to obtain referrals and advice. Other tips include creating your own opportunity by directly contacting a target company and utilizing campus resources like the Feld Career Center for personalized guidance.