I love the way this looks.. But can never pull it off?(Girls only please)

http://data.whicdn.com/images/1509438/170238.1_thumb.jpg?1266315566
http://data.whicdn.com/images/694463/tumblr_kol5pnFijq1qzeqeno1_500_thumb.jpg?1252183195
http://static.rockbrookcamp.com/files/2007/03/bracelets.jpg
http://static.rockbrookcamp.com/files/2009/09/girls-friendship-bracelets-300x300.jpg

I mean. Not that it looks bad on me. But i just can never figure out how to do it. I honestly think its sexy. The hole bracelet thing. I love the first one and the second one the most.

Also.
How can i get my nails to look REALLY nice. They always turn out shitty.
http://www.washingtonian.com/block_dbimages/6971/nails_polish.jpg