Er, no. Really not - and I would urge anybody thinking of looking at pro-ana or pro-mia websites never to do so.
There are very healthy ways of losing weight, but pro-ana sites will not tell you any of these. The only tips pro-ana sites will give you are unhealthy ones - they are written for anorexics by anorexics, and I certainly would never take advice from an anorexic about food. They will tell you to starve yourself, and make yourself throw up if you do eat something. Pro-ana sites are sick and if you care about your health you should not take any advice from them.