 Startup co-founder doing consulting on the side, IP issues
jhancock: Here's what I did: Write your exclusions in the NDA or contract agreement.  Be clear about what your doing with them.  If your not a real competitor to them, they should go along with it.  Negotiate this with the person needing your work, not their legal or HR people.I did contract work as chief architect for Fortune 100 companies while I was building up assets for my startup in the 90s.  My work for these megacorps including my building and licensing them some of those assets with the understanding that I could continue using the IP on my own.  I never had a problem.