Sometimes when we're stuck or need some inspiration it's great to look to people who are doing the things we want to do. If it's someone that is well-known or someone who has a following it's more likely that you can find articles, books, or even video about that person. Read, watch, and learn from other people's experiences and mistakes. Use that information and take notes. (Make note taking a practice when engaging in enlightening conversations or learning about something.) With this creative challenge tip you're building a library of notes, ideas, and thoughts that you can revisit and use as needed.
If it's someone who isn't well known, then maybe you can just email them or invite them out for coffee if they're local (read my tips here on how to approach someone online).
Be careful with today's tip, though. Understand that every path is different and what works for some may not work for you. Examine what you've learned from your "virtual mentor" and really think about how it applies to you, think about what inspired you about their words or statement, and figure out if it's something you can incorporate into your own creative practice.
Is there someone you admire you're interested in knowing more about? I'm curious to learn more about other illustrators doing fun projects and collaborations.