This post assumes you are as obsessed about tea as I am. If you are not, you have my permission to just wonder, "What's up with this guy?" :D
I find it handy to have a list of the teas that I've tried and my detailed thoughts on them, as I can't remember everything since I've tried so many teas at this point. Keeping a list has helped me avoid re-sampling the same tea accidentally and to learn what styles and regions of tea I enjoy.
I use airtable.com (shown in the screenshot). I started out using Google Sheets, but I was feeling limited. I wanted to dynamically sort, filter, and search my spreadsheet - as if it were a UI form. I also wanted to add tags to describe my teas, again for quick filtering and such. airtable.com seems to be everything I need.