[First of all, what is a “wiki”? By definition, it's “a website or similar online resource which allows users to add and edit content collectively.”]
Broaden Your Musical Horizons contains a list of easy-to-do activities to Goose Your Muse. (And you can add your own suggestions too.)
The first one on the list is “Listen to Internet radio stations.” Let me suggest two that I enjoy and may have mentioned to you before:
Whole Wheat Radio (located in Alaska, plays indie singer/songwriters, shuns current hits)
Radio Paradise (eclectic online rock)
And yes, you can submit your original songs to them for “airplay.” Check out the quality of what they're already playing, to see if you fit in.