I have hundreds of sewing patterns. When I see a style I like I just buy the pattern and someday maybe find the fabric. After I started designing knitwear, I used the patterns for grading. It gives me what the average measurements for whatever dimension I need for whatever size. I even have the same pattern in different sizes to cover the range I need to design for. I google the pattern and pin the pattern to my board, note the size and my physical patterns are in a filing cabinet organized alphabetically and numerically. Easy to find, easy to browse to see what I already have.
I do have one complaint, pattern companies reuse the numbers so through the years there will be 2 or 3 versions of Butterick xxxx but I figure those are few. Also I do have some patterns not on the net yet, I'll have to take a photo and upload them.
My pinterest page is
here.
https://www.pinterest.com/tangramknits/my-sewing-patterns/