What to do with the left over yarns

Most of the times I will have left over yarns after I completed a project. Very wasteful to throw away the 1-2 balls of yarn but I wouldn't want to do something out of it for myself or for Constance if the colors is not right. So why not use it to knit scarves for friends and colleagues? This way I won't have to pile up on the left over yarns in my knitting box to collect dust hehe...Brilliant me!

Once I finish knitting my friend's poncho, which is about 8 inches in lenght already, I am going to knit a scarf for my AO (Administrative Officer) who is going to USA to visit her son in December. Don't waste the yarns =)