Once you have recognized these leads, nurture them with follow up through various modes like emails, phone calls, e-newsletters, postal mails, etc.
Try to make a convincing invitation to drive registration. Don't give them a reason to feel like your invitation is a corporate "fill in the blank" form. Target a specific segment and make a personal connection, so you can retain them longer.
To increase sales, retain your existing customers and attract leads, create a special offer to showcase in your webinar. Discounts and promotions are a proven tactic to boost sales. It is a common human tendency to be attracted towards anything that benefits them.
Tips to make your webinar more successful