The very first thing is the purpose of a project plan:

The basic purpose is to maintain control of a project. As a complicated process, a software project always creates pressure to exceed the limit of your control. To maintain control you need help in the form of paraphernalia and your best tool is your plan. The project plan controls the project by:

Providing visibility for vague or ambiguous odd jobs in the project

Providing a baseline against which implementation of the project can be compared

Foreseeing likely events and providing pre-planned means of avoiding them.

The simple funda is that a project plan must be as accurate and as specific as possible. Here are some of the explicit features of a well-planned Software project management:-

The first thing is Project estimate as it provides a foundation for project plans. A careless estimate can undercut the project in all these respects, making it difficult and impossible to complete it efficiently.

Estimates ones made should be revised as revised estimates created at the end of each main phase of the project allow for mid-course corrections and facilitate to keep the project on solid footing.

Then the Quality Assurance Plan which includes both technical reviews and testing which assures that the project will not give way to a costly and defect-ridden test, and correction cycle

There are few other tips for successful software project management i.e., project handling part:-

It may sound understandable, but you should be able to clearly state the goal of your project in a single sentence. If you can't, your chance of achieving it is wiry.

The best tip is that spend time on planning and designing the software project because a traditional mistake is to leap before you are ready. So spend some time deciding exactly how you’re going to solve your problem in the most efficient and stylish way.

Always keep in mind that whatever you promise should be delivered so it is better to promise low and deliver high. Try and deliver happy surprises and not unpleasant ones. By understating your goals and delivering more than your promised, you:

If everything goes right and you will finish early, everyone will be happy. If something goes wrong you might still finish on time; but if a thing goes really bad you might still not deliver what you anticipated but it will still be better than if you over-promised.