Jambole.com

• MindTools - Leadership
  Through patience, persistence and hard work, you can be a truly effective leader, just as long as you make the effort needed (A lot of other resources on this site too).
• workingpsychology.com - Influence Strategies
  Marwell & Schmitt's Taxonomy of 16 influence tactics. Its a "classic" taxonomy (from 1967) that inspired a lot of subsequent research, writing, and thinking about the topic of influence.
• Leadership: Control vs. Influence
  Drawing the distiction between Control and Influence in Leadership
• JohnMaxwell.com
  I do agree with John Maxwell philosophy. Especially his belief in the importance of valuing the people who work for you, and the importance of demonstrating integrity.

Leadership Books and Resources

• The 21 Irrefutable Laws of Leadership
  With each Law, John describes the theory behind each law, expanding on it and giving examples. You'll find vauable insights on every page!