Chances are you had a good idea for a column in the middle of the night, but have now forgotten it. Plenty of time. Sharpen some more pencils. Call it a day. Take the day off.
Writing is a sensitive process.
Don't rush it. Now it's time to get serious, as you have a deadline approaching. Even if you don't have an idea yet, you have to force yourself to come up with one. Think of something interesting that has happened to you recently. No, that's no good.