Register on a free language exchange website. You can search the forums and listings for native Arabic speakers who would like to improve their English. Choose a native speaker of the same Arabic dialect that you are studying. If you are able to speak some Arabic, then choose a language partner with poor English. This will make it easier for you to speak Arabic without your partner switching back to English. You can communicate through e-mail, instant messaging and over Skype.
Read Arabic and watch and listen to Arabic language programing. Al Jazeera's website is available in English and Arabic, so you can read the articles in Arabic and refer to the English version for clarification. The website also has live broadcasts you can use to improve your listening comprehension. Arabic newspapers are available online, as are other Arabic TV programs. Browse your local DVD rental store for Arabic language movies in the foreign films section.
Register for an Arabic language immersion program in an Arabic-speaking country. Choose the country based on the variety of Arabic that you are studying. After studying Arabic every day in class, you will also be forced to use what you have learned in day-to-day interactions with local speakers. This is also the best way to pick up a regional accent and slang.