Turning slight hill into straight land?

my house is currently on a slight hill and my back yard has a slight slope which makes a small hill going downwards. my question is how do i straighten out a slope so it can be straight land. I ask this because my lawn furniture is never level on the ground so I would like to make the land Straight so my... show more my house is currently on a slight hill and my back yard has a slight slope which makes a small hill going downwards. my question is how do i straighten out a slope so it can be straight land. I ask this because my lawn furniture is never level on the ground so I would like to make the land Straight so my furniture can be straight on the ground

thanks
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