I have a handful of sites that I visit frequently. I wrote a script called "to" that has an embedded list of these sites' URL's along with some metadata that includes the preferred browser client and a short mnemonic name for the site. When I issue a command like:

to hn

The script will open the site https://news.ycombinator.com with Chrome. I also have a help screen that lists the URL's and their mnemonics. Again, note that this is a very short list.

I like working at a command-line so it's often faster for me to run something like this instead of typing the first few characters of a site name into a browser and waiting for the URL autocomplete to finish the URL for me.