- Join Ravelry. It's a knit and crochet site that offers tons of directions and patterns (among other things). It's free to join; you'll just need to set up an account.
- Browse their patterns. If I limit my search to free crocheted scarf pattern, I get 108 pages of choices! If I limit it to free knit scarf patterns, there are 201 PAGES of choices! It'll take you longer to choose than it will to actually make the scarf!
- Buy the yarn you'll need. Here's where the expense comes in, but consider your budget and purchase a yarn that fits. I made the scarf in the photo from two skeins of yarn that I got for a great price in a clearance bin last year.