Write the actions on 3" x 5" cards or adhesive memo notes, and place them in order. This makes rearrangement easier when actions become cramped or require revision. Add arrows when the layout is stabilized.
Where the process involves multiple people or groups, use a Deployment Flowchart, which has one column for each group or person, separated by vertical dotted lines as in the illustration. Order the columns so that people who communicate are adjacent and the overall flow is still left to right.