Here's a good thread
How do you keep track of it all?

Anyway I use Excel too. 3 columns, 1 for the brand, 1 for the color name and the 3rd for what the product is (shadow, liner, gloss etc.)

Though I've had to have 3 separate do***ents cause I have too much stuff so I have one doc for lip products, 1 for face products and one for eyes.

I do it in alphabetical order by brand then w/in the brand alphabetically too.

But I just recently listed all my stuff in my notepad so I'll be using that more.