If you need ideas to get started on making a scarf, there are many free patterns out on the internet, ranging from easy/beginner to difficult/expert patterns.
Check out the major yarn brand sites for their free patterns. Some may require you to sign up so that you can log-in for the pattern, but the membership is free.
Bernat.com – selection of knit and crochet scarves
Caron.com – selection of knit and crochet scarves
Caron.com – Ponchos and wraps
LionBrand.com – selection of knit and crochet scarves
RedHeart.com – selection of knit and crochet scarves
KnittingHelp.com – free patterns for scarves
Tipnut.com – collection of free crochet scarf patterns; knit scarf patterns; shawl/wrap patterns
AllFreeCrochet.com – collection of scarves and cowl patterns
(click on photo for link to pattern)