I have been keeping an ET journal for about a month now, and I have found it valuable. 1. The act of keeping it - deciding what is important & writing it down - helps. 2. The ability to reflect on what you have done & look for patterns good/bad helps. 3. A public journal - when accompamnied by a plan - is an additional pressure to stick to the plan 4. A public journal attracts comments - some are helpful. Of these, No. 1, is by far the most important.
Heres my business plan.... promotion via an ET journal. Posting live trade ideas. Gather a following. Start charging the following 200 bucks a month.
Try it and get back to me. If you can get a hundred or so members you will make a nice living. I would bet you wont though. Its not as easy as it looks.