To develop a tactical plan for low intensity disruption of corporate targets, analyse the company and identify its essential elements. List all the things the business needs for it to function normally, and I then brainstorm ways to interfere with those things; ways to deprive the business of what it needs to operate.
Be as thorough as possible. Some things may be so obvious that you may overlook them. For example, if it is a restaurant franchise, you may think of their need for food supplies and refrigeration, but you may forget something simple like tables and chairs.
Depriving them of any of these things will disrupt operations and incur financial loss.