Everyone knows the importance of backups and I am not here to harp on that. One thing you may want to consider, however, is having a backup of your router settings in the form of screenshots.
Hypothetically, assume your router got fried by either a power surge, inadvertent user error or a freak occurrence. Do you know what all your settings (ISP info, IP configuration, port forwarding, wireless configuration) are? If you know, they are easy to rebuild on the same or a different router, but if not you have to hunt all these down again which can be time consuming.
To avoid this hassle, just take quick screenshots of all your router configurations and tuck them away somewhere. This way you can easily restore them in the event you ever have to replace your router.
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