Act solely in the interest of plan participants — This may seem obvious, but you cannot prioritize your board, president, or local community interests over the plan participants. Act prudently — The duty to act prudently requires expertise in areas such as investment. Lacking that expertise, a fiduciary should hire someone with that professional knowledge. Fiduciaries are responsible for a decision process, not investment results. The process used to make decisions must be documented to show fiduciaries acted prudently.