It's interesting how one of the best sources of information are sites providing the information as a side dish to their core business. For example I was search

It's interesting how one of the best sources of information are sites providing the information as a side dish to their core business. For example I was searching for a lease termination letter template. There are sites dedicated to documents, letters, forms and templates. Many of them are pretty spammy or messy. Then I found a page of a real estate portal. They had just what I needed, without superfluous ads with nice UX. It's in their interest to help people to do this, because then they will probably search for a next apartment. They, of course, are fast to offer additional services on top like searching for the move services. But nevertheless, providing this service is something on edge what they are doing - a marketplace for real estate. Only then they will get some money, so the side experience should be as smooth and painless as possible. Another example is a tax/salary calculator on a job board. Or... most what Google is doing to some extent, but with different trade-offs. I know it's nothing new, but it was interesting for me to notice it recently so directly.