Without calls to action, you won't get any leads.
As a marketer, you should be placing calls to action all over the place - in your emails, on your website, in your blog articles, in your ebooks, in your presentations, in your videos... anyplace you can think of.
Here is a fun example from the bathroom at a nonprofit where the HubSpot marketing team did a volunteer project. You are presented with a call to action while you releive yourself. Crazy? Maybe. Effective? Probably.
What's the most remarkable place you have seen a call to action?