Develop Your Plan
By having a simple plan you will be able to identify each task that needs to be completed before your deadline.
Always build in some contingency time because something will always go wrong when you least expect it. If you don't use this time then you will have some additional time to complete your tasks.
Can you use Critical Path Analysis? This is a useful planning tool that can help you to establish which tasks can be done simultaneously and which tasks rely on others to be completed first.
Set some interim deadlines to include writing time, checking time and publication time.