What are three key ideas found in the english bill of rights ? explain the importance of each to america's founding?

Due Process. Due process would take on more importance in the time leading up to the American Revolution. Colonists often felt that they were denied due process. 
Grievances. The English Bill of Rights lists various grievances that were laid upon King James in a very similar fashion to how Colonists blamed King George. Both also put into writing why they were unhappy and wanting change. They did this writing allowing the world to better understand their complaints and reasons. 
Limitations on the "Executive" Branch. The English Bill of Rights also placed limits and pointed out how the King had overstretched his power and bounds. This is similar to restrictions placed upon the President. Both the President and the King had to consult their legislative branches in regards to being able to do certain things.