That's one of the most important decisions you'll make today.
How much time and effort should you spend on absorbing data and planning? and How much time and effort should you spend in creating something new?
Once you've read all the books, blogs, and magazines in the word. What's left?... Time to start doing.
If you are the person who always gets caught in a perpetual "state of planning and preparing", time to stop preparing and start DOING.