What are the good books, online lecture notes or starting material on exponentials sums with applications in number theory for a beginner, apart from N. M. Korobov's book? The book or notes should cover methods of Weyl, van der Corput and Vinogradov, with some details.
Shparlinski has a nice set of lecture notes, aimed at beginners, with a view towards applications: http://www2.ims.nus.edu.sg/Programs/coding/files/ishpar.ps
Maybe you will find something useful in the book of Iwaniec & Kowalski entitled " Analytic Number Theory". Morever, I think Huxley's "Area, Lattice Points and Exponential Sums" is worthwhile to read, which focuses a new method deveploed by Bombieri, Iwaniec, Huxley himself and many other followers.