Update: Sorry, I'm already overwhelmed with the response, I'll be taking no more submissions after a handful of more comments. Once I have caught up I'll do another thread. Feel free to follow me so you get an alert when that thread is open. However, look for what advice I give to others, because it will most likely apply to you and your product.
I'm a web developer enthusiast and will give anyone who sends me their landing page in the comments 10 pieces of advice.
It could be how to rank your site on the 1st page, or even how to improve sales and marketing strategy.
Leave a comment with a link to your landing page, and I'll be happy to help.