In response to the extra landing pages, our key thing for our business following on from the above comments is to remember that fresh and unique content is best.
We have spent a lot of money on our websites as well as clients in building extra pages, what we do is have a plan. For example if we have 30 pages to add, we spread this over a period of weeks/months. Rather than bashing them all out together. We do everything in a natural organic manner.
Hope this helps, it is our first post!