Having an overall plan in mind for the garden does not mean having to create an artistic masterpiece on paper. Garden design is entirely personal and depends on the garden, its uses and its owners - using a rough plan simply helps to keep things in perspective.
Assess Your Needs
Gardens come in all shapes and sizes and no two will ever look alike, especially once the plants are in place. How it is designed will depend on its intended use and the amount of time you want to spend maintaining it.
Where the garden belongs to a couple, or a single person, there is larger scope in the choice of plants. In a family garden, however, the plants have to be altogether more robust. Safety is also a priority where there are children; plants that bear thorns and prickles should be kept away from play areas. If the size of garden allows, create an area for the children to play where the plants are safe, resilient and easily pruned back, allowing the rest of the garden to be filled with more choice species.
Tailor the level of maintenance to suit your needs. If you don't have a lot of time, make use of mulches and ground-covering plants to smother weeds and conserve moisture for a low-upkeep regime.
Remember too, in a small garden, every plant should earn its place by providing a good display at least once, and preferably twice through the year.