Who uses webinars to generate leads?

The use of webinars a growth hack / lead gen is getting more common.

Let's share webinar tips:

1. how to get people to sign up for your webinar
2. What do you do to engage with them during and after webinar?
3. Any software you use - tips about the software itself
4. Attaching a contest to your webinar
5. Call to action during / after webinar.
6. Webinar replays - hacks...
7. Referral marketing with webinars? Do you ask your respondents to invite their friends?

Let's see how many indies use webinars to generate leads