Since one of my areas of focus is International Education I want to mention how easy it is to advocate using social media and this field as an example. Basically, there are a number of tools you can use to advocate for this cause. You can follow blogs, tweets, and Facebook pages. In addition, almost every Congressperson and Representative has a Facebook and/or Twitter account that you can follow/like. If you do this then you can post messages to their walls and retweet messages and mention them using their Twitter name. Furthermore, almost every government agency has a Facebook page and most have a Twitter account which means you can follow the agencies that pertain to your field/cause. Twitter also has lists already created so all you need to do is follow the list and you will be kept up-to-date on the happens of the people on the list. For example, their is a Twitter list for republicans as well as democrats.
Finally, some tips on proper etiquette when it comes to interacting with people you want to advocate with or to. One of the biggest tips is to proofread everything before you click submit. Grammatical errors can take away from the message you are trying to send. In addition, don't write an anonymous message. Make sure to leave your name. This gives more credence to your message. Finally, if you are going to tweet or send a Facebook message make sure you don't post all of your tweets or posts at once. It is better to spread them out during the day and there are tools available to assist with that so you don't have to be at your computer to even send the messages.
Some of the resources you can look into specifically for International Education and advocacy are:
http://www.nafsa.org - which has blogs, a Facebook page, a Twitter page, etc.
http://www.connectingourworld.org - a grassroots resource for International Education
If you are interested in additional resources which are available to advocate for international education please let me know. I am happy to provide the resources I have collected so far. Talk to you again soon.