Ask HN: How do I speak more at conferences?

I've started tracking a list of indie developer & freelancer friendly conferences over at my Indie Conference site [1]. On the associated mailing list I'm hoping to notify people of upcoming Call For Presentations deadlines. A few I've found coming up soon:

UIKonf presentations are due February 15: http://www.uikonf.com/#cfp

Xojo XDC USA has a call for presentations due on Feb 26, though your talk would need to be related to Xojo / REALbasic: http://www.xojo.com/xdc/HTML/index.html

YOW! Perth presentations close on 13 March: http://west.yowconference.com.au/call-for-presentations/

Business Of Software runs a call for speakers all year round: http://thebln.com/speaking/

[1] http://www.indieconference.com/

I've been using https://calltospeakers.com/ to find conferences that are looking for talk submissions.

Prepare some talks on topics that you are pro at and then share them. That way you can send samples to different relevant speaking events.