Till the soil in your garden so that the first 1-foot layer is mixed together, with top and bottom soil indistinct. This also allows for aeration of the soil.
Stake out where you wish the ends of your rows to be on either side of the garden bed using stakes. The stakes standing out of the ground are also a useful way to label the following rows so you can determine which vegetable or flower is growing where.
String the twine between the two stakes tautly. This will be your guide for plowing the rows.
Tilt the garden hoe so that one of the corners of the front is touching the earth. Insert it several inches down or according to the growing requirements of your plant and where the seed should be placed in the soil.
Drag the hoe along the soil, creating an indent, beginning at one stake and dragging it directly underneath the twine to the other. Repeat this with all the marked rows. Remove the twine if desired.