Here is a goal: How can I edge my lawn without an edger?

Which way makes more sense to accomplish this goal?

Options are: --To edge your lawn, garden, or flowerbed, lay down a 26. While holding the board with your foot, drive a flat screwdriver along the board's edge. Move the board as needed to create a clean, straight line.. --To edge your lawn, garden, or flowerbed, lay down a 26. While holding the board with your foot, drive a flat spade along the board's edge. Move the board as needed to create a clean, straight line..
To edge your lawn, garden, or flowerbed, lay down a 26. While holding the board with your foot, drive a flat spade along the board's edge. Move the board as needed to create a clean, straight line.