I personally made the mistake of to join several affiliate programs at the same time and not to focus on one thing at a time.
Then joined to tens of email lists and have the computer hard drive full of information products that you cannot read at the same speed that you get it.
I would recommend to people who is still starting that to invest one day or two searching about internet marketing, ways to start a business and make money, once decided for one business niche, one good idea is to read about list building, get an email management system and start building a list, without promoting anything but providing good advise on online business.
It relly short the space and time to write down thousands of ideas.
But the point is:
Focus on one thing at a time and treat your online business as your online business not as a hobby, set a goals on your mind, try to find a mentor, do not discover the wheel again.