Windows
Go to C:Windows\system32\drivers\etc, and open the file titled Hosts in Notepad. Go to the first free line, and enter:
127.0.0.1 www.smouch.net 127.0.0.1 smouch.net
It should look something like this:
Save the file. Now, open any web browser (Firefox, Internet Explorer, Google Chrome, etc), and try going to: http://smouch.net/lol You should get an error message similar to this:
If you want to block other sites, just add more lines, but instead of smouch.net and www.smouch.net, use flightsimhq.com and www.flightsimhq.com (for example). This will block all parts of www.flightsimhq.com, such as www.flightsimhq.com/forums, etc.
OSX
Open the Terminal application, and enter this command:
sudo /usr/bin/pico /etc/hosts
Hit enter, and you will need to type your password in.
Now, press the down arrow key until you're under all the other text, and enter this:
127.0.0.1 www.smouch.net 127.0.0.1 smouch.net
It should now look like this:
Press Command+Up Arrow+Enter to save, and exit Terminal.
Now, open any browser and test it out! http://smouch.net/lol You should get an error similar to this:
If you want to block other sites, just add more lines, but instead of smouch.net and www.smouch.net, use flightsimhq.com and www.flightsimhq.com (for example). This will block all parts of www.flightsimhq.com, such as www.flightsimhq.com/forums, etc.
Hope someone finds this guide useful.