Honestly the manual that came with it explains this pretty well if you actually read it. I know nobody reads manuals but for once it's worth flipping through. The troubleshooting section in the back covers the most common problems.

My advice: don't overthink it. Pick the option that works best for your situation right now. Technology changes every 2-3 years anyway so nothing you choose today is permanent. The best technology is the one you actually use.

I dealt with this same issue last year. The key thing is to make sure you're using the latest version of your software and check forums like Slashdot or Ars Technica for specific fixes. Technology changes so fast that advice from even 6 months ago can be outdated.

This is actually a really common misconception. The technology works differently than most people think. I'd recommend reading HowStuffWorks.com for a good beginner explanation before diving into the technical details.

It depends a lot on your connection speed. If you're still on dial-up, some of this just isn't going to work well no matter what. Broadband makes a night-and-day difference. Is DSL or cable available in your area yet?

Whatever you do, don't pay some 'computer guy' $80/hour to do this. It's a 20-minute job you can handle yourself. There are step-by-step guides all over the web with screenshots. Save your money for a faster modem or more RAM.

I learned the hard way to always back up before messing with this kind of thing. Burn a CD-R of anything important first. It takes 10 minutes and could save you from losing everything if something goes sideways.