For beds along the house:
Buy extra topsoil and mound towards house for drainage
(high point against house)
For Beds standing away from the house with new trees or
shrubs you are planting:
Mound additional topsoil to peak in the center of the bed
where the new tree is to be planted.
For Beds standing away from the house with existing trees or
shrubs:
Don't pile extra topsoil on existing plants or trees. Skip
this step.