Ok, now that we have a sourdough starter ready...... (having a rough day)

Ok.  I now have a beatiful sourdough starter rearing and ready to go.

Today, I took the time and made a motherstarter that is nice and firm and has doubled in size...

But what do I do now with the motherstarter? 

How do I incorporate it into a dough recipe? 

I am pretty sure that the answers to these questions are as plain as the nose on my face, but I have had one VERY mentally tough day.

Can anyone hold my hand and tell me which direction to go?