Im stuck on the seventh set on songs on guitar ero 3 on hard mode. any advice or tips?

Practice, Practice Practice, and practice them slowed down and doing the same parts over and over making it faster when you perfect it. Practice is very important and remember you don't need to do the whole song perfect, just need to be able to do a large percent of it without making too many mistakes. Work on the bits you find hardest until you can do most of it without making too many mistakes. Work on the bits that make you fail when playing the whole song at normal speed.Im stuck on the seventh set on songs on guitar ero 3 on hard mode. any advice or tips?
Play them on medium until you 5-star them.