I was for myself very important to distinguish the following themes, in order of importancy:
1. trading psychology
2. disciplined trading (trading by a strategy)
3. money management (also position sizing)
4. instrument selection (stocks, option, forex, CFD, futures, etc)
5. exit signals
6. entry signals (this is indeed on the last spot, because it is the least important. That's why it is very strange that it is the main subject of discussions on the internet. 80% of your success in trading is caused by psychology, discipline and money management!).
The books which helped me on these themes are:
1. Mark Douglas - Trading in the Zone
2. John Carter - Mastering the Trade
3. K. van Tharp - Trade your way to Financial Freedom
5 and 6.:
- Constance Brown - Technical Analysis for the Trading professional
- John Hayden - RSI: The complete Guide
I totally agree with the thing i read on this page, that one's must develop it's own strategy. Only after developing your own, you have the trust in following it in detail and in a disciplined manner.
Good luck!