"[1] [P]lan fiduciaries should call a meeting with the plan's investment advisors and service providers to discuss status of the retirement plan.... [2] Consider creating a communications plan to enhance participants' understanding of the plan and investments, as well as allay fears.... [3] Ensure plan documents (including summary plan descriptions) are organized in a fashion that they can be easily provided to meet any participant document requests. [4] Maintain regular contact with each other and determine ways to reach each other, as well as investment advisors and service providers, from remote locations."