Just want to add a few words as I see that there has been mention of Trading in the Zone - with some good comments from Osbourne.
NoDoji, I've been reading a bit your journal, particularly your last post about trading and emotions and I can't stress enough how beneficial that book would be to your trading. It was a cornerstone in my trading carreer, these are a few words to show how it relates to emotions in trading and the way you can work on mastering them to improve your results.
First, you probably know that but there is no such thing as protecting your profits because it could be the last trade for the day. If your strategy has a positive expectancy, your job is to flawlessly execute the plan. Going to one opportunity to the next and trading each of them regardless of your daiy pnl or the time of the day. Period. Emotions will affect your decision making process and will negatively impact your strategy bottomline. On the other hand, if you trade like a robot, like the strategy says on paper, then the profits will take care of themselves.
Now how to get there? Trading without emotion (or at least having them under control and as low as possible) is not impossible but it takes a lot of energy to get to that state of mind. Unfortunately being aware of a certain emotion (fear of losing, greed, ...) that kicks in while you trade is not enough because you need a much stronger mental force to counter it. The force that is needed is trust. Trust in your strategy, trust in yourself as a winning trader. Some think they have it, but in reality they don't. If you catch yourself tightening your stoploss to b.e. because you want to protect your daily pnl while the strategy says you should leave more room for the trade to develop, then you don't really trust your strategy because if you did you would know that whatever the outcome of that trade is, you're doing what is best for your equity curve over the long haul.
Acquiring that trust, that strength, is like getting rid of a bad habit and replacing it with a new one. If you want to stop smoking, you have to force yourself to accept a new habit, a new belief (be it a new image of you: a non smoker, replacing it with a new sport, etc...) and in the process of doing that, you unconsciously acquire a new, stronger mental force. The same applies to trading and emotions.
The book explains in details the above and gives the tools to get to the desired state of mind. There are probably other books/authors on this subject that are good as well, maybe others can make recommendations. I know this one in particular did a great job for me, so I hope this helps. Also, NLP visualization exercises are excellent before/during the trading day. Good luck with your trading.