The Pareto Principle (80/20)
Identify the 20% of the syllabus that gives 80% of the marks. Focus on these 'high-yield' topics first to clear your backlog.
The Buffer Hour
Add one 'Backlog Hour' to your daily routine. Don't try to clear everything on a Sunday; you will burn out. 1 hour daily is more sustainable.
Note: Some backlogs (like old daily news) are better left ignored. Just start from today's news and use a monthly digest for the past.