...if you want to find it without having to browse dozens of pages looking for it.....
That's the fun part!
I can't begin to count the number of times I've flipped through the catalog not looking for anything, just curious to see what they have. There's always something else to find that you never knew existed to start with. Then there are things you see and could use but didn't know what they were called.
Start at the beginning and over a few evenings or weeks you'll get to the end, and then you'll have a better idea of what's available and where to find it when you need something.
There's really no substitute for the paper catalog but the online one has improved in leaps and bounds over the past 10 years or so.
Grigg