Try a Smarter Way of Staying on Top of Twitter

"Buffer gives you a smarter way to stay on top of your tweeting. It lets you add tweets to your Buffer, which will then be evenly spread throughout a number of days. It is different from existing ways to schedule tweets because it eliminates the hassle of setting the time for each tweet."

http://reviewzntips.blogspot.com/2011/02/buffer-tweet-scheduler.html

"One of the key benefits is that you can work out all your tweets at one point in time. By focusing on creating great tweets whilst not in the middle of something else, you can be sure that the quality will be higher. You can choose to produce your tweets at a time when you are in “content-production mode”."

http://bufferapp.com/