What should I do first?

As someone who tracks a lot of different areas (technology and music are the two top-level categories) I've been struck this morning by the vast plethora of possibilities. So how is a businessperson supposed to decide on a course of action? As a musician and as a businessman, I'm told that I need to be marketing myself - and here are a ton of places where I can do that online. MySpace, FaceBook, LinkedIn, BrownBook, YellowPages, tons of musician directories, personal website, iTunes, Twitter, Feedburner.... the lsit is essentially endless.... and oh yeah, don't forget about video marketing and podcasting and....... It's probably the same way it's always been (which method of marketing is the most efficient for a given product) - the difference now being that I can do all of this myself given my skills in using online resources (plus some serious html/data manipulation skills - which are not necessary for many of these tools. Writing, however, is an essential skill.) But how do you decide what is a good use of your time? For me, I tend to avoid the "hot new thing" - Twitter being the thing at the moment. Yes, I'm on FaceBook, and linkedin, and mySpace, but none of them are a religion with me. I do a podcast on occasion, and several blogs like this one - but again, none of these are my focus. I do them for research purposes, partly - and partly for business reasons and online visibility - and partly because it's interesting. I've looked at Twitter - but I have work to do, and can't take the time to care what a particular Biz Guru is doing at the moment. I need time to think about what I'm working on, and to interrupt that thought-flow with a 160 character message about how someone is at Starbucks and the line is real long is ludicrous - even if they were Seth Godin (though I doubt Seth would be tweeting about Starbucks). So how do you decide? Dunno. I'm still experimenting with all the online marketing things. It's not boring!