Fixed IP addresses in Home LAN with Netcomm Router

I was wondering for a while how I can have fixed IP addresses on my home LAN. I needed that because I was getting different IPs after a each boot and this was a problem in port forwarding since I had to change port forwardings every now and then. After a bit of Googling this was what I found:

1. Keep the DHCP in the router. No need to disable it.
   
2. Change the IP range for example from 192.168.(1-254) to 192.168.(100-254)
3. Give static IP addresses to your devices, below 100.
   
4. Don't forget the gateway (usually 192.168.1.1) and DNS servers. Keep the default submask.
   
5. Done!