Marketing, Sales, Product Development, Deployment can all be run in a lean way. What does this mean. This means dividing up the individual tasks into individual chunks.
For marketing divide up projects into individual chunks. Each project is its own independent silo with its own purpose. Look at how Acksin has its different products and different purposes.
Sales requires segmenting a market. How you approach people with different titles and also how those people's roles changes also affects how you reach out to them. Yes, I am sorry all of you are not the same lot of you fall into particular groups and honestly this is the way to do it. Read the Lean Analytics on defining a user for each product. Figure out a way to reach out each individual person.
Product Development. Well just read Lean Analytics for that.