Reduce the amount of work your soil needs by the way you treat it

Sandy soil lacks the ability to retain moisture, there is a need to improve it to cut the amount of watering needed. Sandy soils can also lose the nutrients in it if they are washed out in heavy rains. This is one of the reason why planting green manures can be a good idea.  Adding humus by green manure crops dug in or adding well rotted horse muck to the soil is also a good idea. Or use compost from your compost heap to add humus and nutrients to your soil.

Just one note against using these - some crops benefit from growing in a soil that was improved not too recently, so they prefer to grow in a soil that was improved the year before. This means you will have added muck to the soil prior to the crop you have grown this year but will not add it this year.