How to stop a Siberian Husky from pulling on the leash during walks?

Oh Eska - she's doing what she was bred to do: pull! I am a fellow husky owner and can relate :-) I recommend teaching her to wear a "Gentle Leader" collar - these can work wonders with dogs who are leash pullers. The collar comes with a little instructional DVD, and it is definitely worth watching to make sure you have a good fit and train her to use it appropriately, as there is a little bit of technique to it. Here's their website:
http://www.petsafe.net/gentleleader

If you're interested, it may also be beneficial to harness her desire to pull and help tire her out. Huskies have amazing amounts of energy, and her love of pulling can be used to your advantage in getting her exercise. She can be taught to pull a sled, or a scooter, or a person on rollerblades or skis... if you can get her to work off some of that excessive energy, she may be less inclined to pull you on a leash! Of course, if you are going to encourage her to pull sometimes, you need to make it very clear to her when she is to pull and when she is not. When she is asked to pull, she should be wearing an appropriate sled dog harness such as this one: http://kondosoutdoors.com/shop/dog-harnesses/
And here's a great beginner book for sled dog training basics:
https://www.amazon.com/Ski-Spot-Run-Enchanting-Dog-Powered/dp/0974801100
We want it to be clear to her that when she's wearing the sled dog harness, she can pull, and when she's wearing the Gentle Leader, she should not. Hope this helps!