Find an industry you are familiar with, or perhaps a friend or family member. Find their pain points. Find how technology can help. Then see if it is something that they will pay for. Look around your daily life. Find problems to fix. Most likely someone else is already fixing them and if not, they will once you start if your idea is good enough.
Two ideas for you off the top of my head:
Do CRM right for SMBs. (Sounds simple, but it's not, because of the S and the M in SMB).
Do time tracking right (timesheet management for contractors etc.). Never saw a single solution that didn't suck to the extreme.
Bonus tip:
Here's a thing though: non techies won't have the advantage a technical person (i.e., adventurous software developer) has: The tech can do it with minimal resources and overheads. If you also have a business sense - that's great. Otherwise break existing market by offering a superior service dirt cheap (but not free!). Once you reach a critical mass, grandfather the existing accounts in their original early bird price and nudge the cost for new customers up a bit. Automate as much as you can and you have a side income with potential to be main income.
Two ideas for you off the top of my head:
Do CRM right for SMBs. (Sounds simple, but it's not, because of the S and the M in SMB).
Do time tracking right (timesheet management for contractors etc.). Never saw a single solution that didn't suck to the extreme.
Bonus tip: Here's a thing though: non techies won't have the advantage a technical person (i.e., adventurous software developer) has: The tech can do it with minimal resources and overheads. If you also have a business sense - that's great. Otherwise break existing market by offering a superior service dirt cheap (but not free!). Once you reach a critical mass, grandfather the existing accounts in their original early bird price and nudge the cost for new customers up a bit. Automate as much as you can and you have a side income with potential to be main income.