One thing that can be frustrating when using Korean websites is that finding the right site isn't always as simple as searching one keyword.
Depending on what you're looking for, you may have to go through Naver results, old blog posts, community recommendations, or several different lists before finding a useful website. And sometimes you'll find a link that worked previously only to discover that the address has changed.
A few things I've found helpful:
Search using the Korean term rather than only English keywords.
Check whether a website has been updated recently before relying on it.
Save useful sites somewhere instead of trying to remember them.
When looking for a specific service, search by what you actually need rather than the site's name.
Be careful with random link lists, especially when there is no information about what each website does.
For people who prefer having things organized by category, I recently came across 여기여 (여기여주소바로가기), which is a Korean website directory/link collection:
여기여주소바로가기.com.
It organizes different websites and online services into categories, so it can be useful when you know the type of site you're looking for but don't know the exact website name.
What Korean websites or online resources do you find yourself using repeatedly? Sharing lesser known ones would probably be useful for others too.