Think about cognitive and personality traits (creativity & optimism), alertness, prior knowledge, social capital, systematic search and environmental conditions
Kuckertz, A., Kuckertz, A., Kollmann, T., Kollmann, T., Krell, P., Krell, P., ... & Stoeckmann, C. (2017). Understanding, differentiating, and measuring opportunity recognition and opportunity exploitation. International Journal of Entrepreneurial Behavior & Research, 23(1), 78-97.
Article Understanding, differentiating, and measuring opportunity re...
The 1st author's email address is after the reference section (or there is ResearchGate contact) if you needed further information.