It can be difficult to come up with content continuously, but when you have a mandate to "keep writing" you have no recourse but to find something that can fill the space.
Here are some suggestions for when you have a case of "writer's block" :
Conduct an interview with someone that readers would find relevant
Post content by guest authors
Cite a link to an article and comment on the information in the article
Provide information about something that is new in your business or industry
Repurpose previous content
List the 3 questions you get asked the most and provide answers to the questions
Spotlight a relevant business
Spotlight an employee of a resource to your company
Provide general tips and tactics that would be interesting to your readers
Create an infographic
Don't obsess over finding a topic and if you find yourself losing sleep over the content that is due the next day, consider outsourcing the work, at least until you get back into the writing groove.