Undecided - to pre-plan or not to pre-plan

Would it be better to post blog entries after planning them or should I do them off the cuff?  I have no plan for today's.  I may sit on this thought and ponder a little.

*comes back after surfing a while*

Nope.  Can't get brain into gear.  Going to bed to think.  Of stuff.  And then blog about it.  Tomorrow.