For monitoring purposes, email is usually the fastest and most flexible means of communication, however we find that when attempting to encourage companies to e.g. introduce sustainability processes and disclosures, it works well to formulate a letter, explaining the benefits of robust processes and reporting, backed-up by academic research, practical examples and evidence. Most ensuing engagement meetings are conference calls. We find it very helpful to combine engagement letters and calls (often with Investor Relations staff), with company meetings (for example at conferences or Roadshows), which are often led by company CEO/CFO, to enforce the story and also in many cases to create an "internal debate and discussion" regarding the engagement topic. This has often been an effective combination of approaches to instigate change.