[xdude]

For those tips, you also need a website with many visitors, if you do not have visitors then there's nothing you can earn.

Not for the last two methods though. If you want to do copyrighting then it can be done without a website or anything. You need to join few sites like Fivver, seoCleark etc. Also can find paid projects from big forums too.

And for Domain trading also need a direct approach. Reaching potential clients by sending mails and reaching them through contact us pages and on forums etc.

But for other method do need serious volume of traffic if to earn some serious money.