How do I fake accent?

Now, as a non-native speaker, I naturally have this weird accent that somehow pops up sometimes among my tv-show influenced bland vanilla american accent.

The question is, how to fix that - and has anyone tried "learning" another accent? Might be cool to pretend you're an Australian sometimes.

>>1
Total immersion is the best. Other than that, practice, practice, practice. Learning another accent is almost exactly like learning a new language.

I can fake the accent I grew up around but rarely used (south Texan) while speaking natively with a Standard American Accent (similar to the Midwest). I am convincing to both groups of speakers.

But if you only know one language and one accent, and have hit about 18-20 years old, good luck; if you can learn a second langauge or accent, it's because you have an excellent ear. The human mind's ability to pick up new accents and languages basically goes away about 16-20 years of age.