Two ways I can think of. 1. You do a real job for a while. Work in a large organisation, see what pain points they have, which ones are probably similar to other businesses and which ones probably don't involve terabytes of proprietary data that they would never be able to shift to an SaaS solution (by never I mean politically not technically). And I don't mean working for tech firm. Be on an IT team for a pharmaceutical company, a food company, packaging company, logistics etc. Be open and offer to help people (outside of IT) and you'll be amazed what ideas they give you.
Way 2. Mix with people in the real world that work in the companies above. Listen to their problems, offer solutions, offer to pop in after work one day or on a weekend and look at their problems.
Way 2. Mix with people in the real world that work in the companies above. Listen to their problems, offer solutions, offer to pop in after work one day or on a weekend and look at their problems.