Internet traffic is growing every day. In general there is a *slight* drop in June-July-August but for most people the internet is a cyclical world. My Champagne pages spike in December. My sangria pages spike in the summer. You can't expect any topic to be a steady level all year around. That wouldn't make sense
You have to watch what people search on and pay attention to that. Articles on skiing will do well in the winter. They'll do less well in the summer.
But since more and more people exist in the world every year, and more and more people are on the internet every month, traffic *should* always be growing. By knowing your cycles, and ensuring you have content in every "section" of the year, when one topic is dropping off you should have another topic naturally growing.
I definitely do NOT recommend linking to sites. You get far more traffic for your site if you have great content. If you start linking you have great danger of being tagged as a link farm. I've never seen any benefit at all in linking or receiving links.