The idea that a fair share of websites which are still not using https is very concerning. Well hey, my site was HTTP only till this morning, My Reason: Why would I pay $10 a year for an SSL Certificate for serving some static content. (basically, I was being cheap), But hey this no longer needs to be the case.
Welcome to the world where Let's Encrypt exists, Few steps and the site is SSL. If you run Apache it will even automate your web server configuration, But I use nginx so it took more than 1 step. so here's what I did.

1. Install Let's Encrypt

Installing is pretty straight forward

$ git clone https://github.com/letsencrypt/letsencrypt

$ cd letsencrypt

2. Generate SSL Certificate

For nginx, there is an experimental plugin but I am doing it manually. Nginx has to be stopped for a moment and then

$ ./letsencrypt-auto certonly --standalone -d example.com -d www.example.com

The certificates are generated in /etc/letsencrypt/live/www.example.com

3. Configure nginx

Update your nginx configuration. Here's Mine,

I am also redirecting all my HTTP traffic to HTTPS. Restart nginx

4. Enjoy :)