Twitter just announced its official tweet button, which allow you simply to retweet your posts, so I will show you by very simple steps how to install the official twitter tweet button in your wordpress.
Step 1:Login your WordPress account
Step 2:Once you login your account, click on Appearance.
Step 3:Click on Extras.
Step 4:Put mark in front of: Show a Twitter “Tweet Button” on my posts. then click on Update Extras, Done.
Here is a sample of how it will look.
