
Compare and contrast: show how one thing is similar to another, and then how the two are different--emphasizing the side that seems more important to you. For example, if your thesis states that "Jazz is a serious art form," you might compare and contrast a jazz composition to a classical one.
You may show your reader what the opposition thinks--that is, reasons why some people do not agree with your thesis--and then refute those reasons--show why they are wrong. On the other hand, if you feel that the opposition isn't entirely wrong, you may say so, that is, concede, but then explain why your thesis is still the right opinion.
Think about the order in which you have made your points. Why have you presented a certain reason or main aspect that develops your thesis first, another second, etc.? If you can't see any particular value in presenting your points in the order you have, think about it some more, until you decide why the order you have is best, or else decide to change the order to one that makes more sense to you.
Finally, as you build the body of your paper, keep revisiting your thesis with three questions in mind. First, does each paragraph develop my thesis? Second, have I done all the development I wish had been done? Third, and most important, am I still satisfied with my working thesis, or have I developed my body in ways that mean I must adjust my thesis to fit what I have learned, what I believe, and what I have actually discussed?

Here are some ways of linking paragraphs:
To show simply that another idea is coming: also, moreover, in addition
To show that the next idea is the logical result of the previous one: therefore, consequently, thus, as a result
To show that the next idea seems to go against the previous one, or is not its logical result: however, nevertheless, still
A grab-bag of other choices for "special occasions": most importantly (to show you've come to your strongest point), on the other hand (to show a change in topic), finally (your final point, of course)
The goals of an introduction are to:
Here are some options for writing a strong conclusion:

What is revising?
Writing is only half the job of writing. What's the answer to this riddle? Well, the writing process begins even before you put pen to paper. And, once you finish actually writing, the process continues. What you have written is not the finished essay, but a first draft--and, as you go over it each time to improve it, a second draft, third draft, as many as necessary to do the job right. Your final draft, edited and proofread, is your essay, ready for your reader's eyes.
Remember, though, that revision of an essay is not simply proofreading. Proofreading is checking over a draft to make sure that everything is complete and correct as far as spelling, grammar, sentence structure, punctuation, and such matters go; it's a necessary, if somewhat tedious and tricky job, one that a friend could help you with--even if that friend is a "Spellcheck" on a computer. No machine can help you with true revision, however, nor would you want it to--a re-vision of your essay, how you see things now, deciding whether your thesis and body, and also your introduction and conclusion, really express your vision.
Revision is global, taking another look at what ideas you have included in your paper and how they are arranged; proofreading is polishing, one spot at a time. That's why revision should come before proofreading: why polish what you might be changing anyway?