Buy the software. This can be done online (see Resources) as long as you have a valid credit card or PayPal account. Download and install the software. Rosetta Stone is also available in some retail locations and mall kiosks.
Save a hard copy of the software by writing it into a DVD, or requesting for the seller to mail you your hard copy.
Read the instructions carefully and apply them in your everyday life. The English language should become part of your routine, not just a daily lesson. This software is capable of teaching you grammar, punctuation, conversational and written English, as well as other aspects of the language.
Focus on the illustrations and photos and work on your written communication skills. Most of the drills in the software have to do with training you to listen and speak the language like a native. If you have a microphone on your computer, go to a language website where people simply converse in other languages.
Request more lessons from Rosetta Stone, if needed. Additional lessons are available for an additional charge, which varies by language.
Register to take your TOEFL exam once you are confident in your language abilities. Rosetta Stone is a good resource to ensure you successfully master the TOEFL.