Bookmark the HandSpeak.com "Phrase of the Week" video lesson webpage. (See the Resources link below.), and visit each week for a new sign language phrase. Spend the time in between lessons practicing the phrases you learn.
Obtain The American Sign Language Phrase Book by Lou Fant, Barbara Fant and Betty Miller. You can check it out at your local library, visit a local book store or purchase it from an online vendor. Another option is to purchase the Kindle download edition and start reading immediately. Other books are also available on the same subject, such as Perfect Phrases in American Sign Language for Beginners and The Art of Sign Language--Phrases.
Locate online video lessons from reputable sources for American sign language phrases. Start American Sign Language provides a searchable database of video lessons for sign language phrases. (See the Resource link.) Use resources like this to learn the phrases you want and need to know immediately.
Attend sign languages classes. Many colleges and universities offer sign languages courses and may, in fact, open them up to the general public due to the popularity of the topic. Check with local sign language associations or schools specifically for the hearing impaired. Often schools that offer classes for the deaf also offer classes for parents in order to maintain family communication. However, if these locations don't offer classes, they should be able to tell you who does. Find more information on workshops, training institutes and distance learning courses from the Laurent Clerc National Deaf Education Center. (See Resources.)
Take a full scale online course, such as the one offered by LifePrint.com, and complete it through self-study at your own pace. LifePrint's college level course is free. However, if you want documentation stating that you completed the course in order for it to count toward a college credit, then you must pay a tuition fee.
Join a local sign language club. These clubs not only help you to hone your sign language skills but give you a community of individuals with whom you can share your thoughts, concerns and questions about being or knowing someone who is hearing impaired.