Need help getting started with your Twitter activism?
Hopefully these instructions will help. (please ask questions or correct any errors...)
You will need to set up an account at http://twitter.com
(if you already have one for personal use, you may want a 2nd for your activism)
To sign up, you will need to come up with a username and password and enter your email address.
After signing up, you will need to verify your email by clicking a link in an email Twitter sends you. Next step is loggin in to your Twitter account and updating your profile. It is a good Idea to upload a picture (photo of you, or some image that represents you like a flag, etc). Don't forget to add a shot one line bio, just a blurb about yourself.
Start 'following" by going to http://twitter.com/endthefedusa
and clicking on the FOLLOW link under the profile picture.
Now you should be ready to start posting Tweets, up to 140 character messages. What I suggest is to post links to news articles, blogs, or your opinion...
I use Google News search to look for news items about the Federal Reserve, etc.
If the URL is too long you a short URL service like http://tinyurl.com
(there are others too). Remember you only have 140 characters per tweet.
This should get you started, play with it, do some searches in Twitter for subjects and see how other people use the service.