Barron's good source for vocab. Memorize as much as u can. U need a lot of reading and repitition and putting into sentence structure helps to retain that in ur longterm memory.practice reading comprehension, analogy ,sentence completion and antonym as well. Bigbook is the great source for verbal if ur target is 500+.

For Analytical writing go into the GRE issue and argument topic pools and practice them.pick 20-30 each.

Remember-Gre cant be mastered but it can be beaten.  To achieve better score u need to devote more time.I would recommend to devote more time unless ur genius.

When writing essay write outlines first, then put them into intro, 3-4 body paragraphs and conclusion.As we know we spend the least time on analytical we should spend a little more to make it worth.