One thing you get a lot of at comic cons are people who not only have a love for the comics medium, but also want to break into making comics themselves.
Certainly, at nearly any comic con you go to, there'll be a handful of panels about how to 'break into' comics, discussing points about the importance of creation and self-motivation, and also having well-known creators share their stories of how they wound up getting their first work at major publishers like Marvel, DC, Image etc.
There's loads of handy information that can be found at these panels, or even searching online and reading creators' tumblrs and tweets. But there's also a lot of information on the topic that can be gleaned from what isn't being actively said.
Now not everyone wants to write for Marvel and/or DC, but certainly some do, so here's some hints and tips I've picked up in my time making comic books and working out the ins and outs of the industry and what has helped me along.
Note: I may not currently be on a big mainstream book, but I have been in and around the industry for a good little while now, and I've certainly picked up some good ideas. So if you'd like some advice, here's what I've learned in that time.