Honestly your best bet is to talk to people. I doubt cold calling/knocking on the door of a business will succeed, but people get enthusiastic when it comes to complaining about tedious/monotonous work. Especially at bars. Turn to someone nearby and say "I am looking for ideas to yadda yadda save people time and frustration. Is there any tedious process you deal with at work which you think doesn't need a person to deal with?" If you travel, this is especially common in airports. I've never asked someone this question and yet people rant at me all the time once I say "software developer".
