One of the most helpful, and hopefully the earliest, pieces of advice every writer comes across is to aim for a shitty first draft. 

That’s because sometimes, when you wait too long to do something—or when you only have one opening per week to do it—you feel like it becomes more precious. Your expectations of the results get higher, to the point where it’s unrealistic or even unattainable. The task becomes almost too difficult to do. An ordinary article takes a Herculean amount of effort to get started on—let alone to complete.

The best way around this sort of block is to rethink how much effort you need to put into it. Not too much. Not too little. A regular amount, and perhaps even a little bit less than that.