These techniques apply to basic CAD programs such as AutoCAD, IntelliCAD, etc. If you have a civil/survey program or add-on, such as Land Desktop, SurvCADD, Eagle Point, etc., then there are built-in tools for entering lines and curves.
Let's say you have a paper plot or a legal description of a closed boundary. Let's work our way around it. Below is an example of what you might have. Start with a line segment if there is one. Let's start in the lower left (or most southwesterly) corner and work clockwise for this example.
For each line segment, a bearing and distance is given.