All of us have to manage projects, whether it be at work or in the home. The process begins early in life, trying to juggle play ground activities with letting frogs loose in the girl's changing rooms.
Project management can be as simple as organizing the tasks required to complete a project but this only really works with the more simple projects. It is widely taught in the basic management training that the 'manager' must initially step back from a project (rather than rush straight into the 'doing') and outline what needs to be done, by whom and in what order to achieve the objective (which must be defined).
We will all go through the phases of 'fridge magnet management' where a simple ToDo list will suffice growing to trying to juggle multiple projects, some with critical dates (be it a board meeting or the first soccer game of the season) and others with limited resources.
There are are variety of project management tools available ranging dramatically in size, complexity and cost that are all designed to help with this process.