Determine the direction you want to move the water in the ditch. This should take advantage of the natural slope of the property and move the water away from the house.
Remove the dirt from the bottom of the ditch with the shovel and wheel barrow to slope it in the desired direction. You may need to move dirt from a high spot and move it to low spot to create the slope in the ditch.
Check the slope of the ditch with a 4-foot level to make sure it is at the desired angle.
Rake the soil in the bottom of the ditch in a V-shape and smooth out the surface.
Throw down grass seed on the bare soil and water regularly until the seed takes hold. The grass will hold together the ground when the ditch is moving water.