Back in the nineties, in the days when Internet was only available on dial-up, I bought a package when came with a free domain name. I registered RichDavies.com. At about this time I taught myself HTML. I decided to build a site to keep the stuff I was currently interested in, on one page. As time went by, I added more pages of subjects I was interested in, and the sites I'd found useful. When I looked at my logs I found that other people regularly used my pages in the same why I did.
Some Examples :-

When I was seeking to change my employer, I put together a page of Specialist Profit Protection Recruiters. This page recieves numerous visits from numerous Loss Prevention professionals, who are either keeping an eye on their own career prospects, or researching the best way to fill their own vacancies.

I was relocating and trying to find a house to buy, so put together a page of UK Property Portals. This allowed my to easily find probably every house for sale in the UK. At this time I also added a Mortgage Calculator page.

I bought the excellent TomTom Sat Nav, but had to do a lot of searching to find the POI and voice downloads I wanted, so added a Sat Nav page.

I added a couple of sub-sites as websites in their right, such as Rebecca's Website, and my Beginners Guide to Tropical Fish. No doubt I'll add a Copyright - The Band site soon (I'm bass guitarist in the band).

I get a fair amount of traffic, so decided to utilise relevant affiliate programs, but my best discovery was Google AdSense. I've found this enhances the visitor experience tremendously by displaying relevant links themed to the page. Visitors can click through to the advertisers page, and I get fee for the click. This will pay for my internet hobby.

I hope you find something on the site which is useful.