Watch the What is Improvisation online guitar lesson by Bill Evans from The Language of Improvisation
I discuss in depth how to look at improvisation on any instrument. Before you can express yourself on your instrument, you need to know the building blocks necessary to accomplish this. I once again stress how you must relate improvisation to telling a story, starting with the words, sentences, and phrases. You have to learn the words first before you can make sentences out of them. You then have to put your sentences together in order to tell a story. The more familiar you are with this concept, the easier it will be for you to become an accomplished improviser with an unlimited amount of ideas. You will be free to express yourself and tell a story every time you pick up your instrument!!