If appropriate we will add your site and search for a reciprocal link on your site, so have that in place first.
2. Don't be lazy and put together a decent press release that we can publish as "news" about your audio related service. This is far better and has more credibility than a quick SPAM forum post. Submit your news here:
http://www.audiocourses.com/submit.html
3. Write a tutorial for us that we can publish, this is the best option for you as you'll get far more interest from our viewers.
4. If none of that takes your interest post your link in here, but avoid crap like "This is the best ever - anywhere in the world". Just post up your services and let others decide.
5. When replying to forum posts PMs are allowed but not other instant message programs which may take the dialogue away from audiocourses.com forums.