Curling form

When it comes to curling weight, dumb bells or barbells, you have to be careful with form. Form is key. With good form you avoid getting injured.
One of the first things I check when curling a barbell is my elbows. I try not to swing because with swinging the weight it's not doing much, so with this at mind, concentrate in keeping your elbows next to your waist and avoid the swinging motion, and try to keep them as still as possible. When you swing your arms and your elbows are moving then you're not really working out your biceps, which is what curling is done for.

Below is a link to a video from bodybuilding.com that has helped me with my curls
http://www.bodybuilding.com/exercises/detail/view/name/barbell-curl

And for a final thought; lift light until you can lift right. I began curling with a 20lbs barbell and even then I struggled. Now I can rep the 50lbs barbell. Everybody has to start somewhere.