Why else have you done all this work?
Reread the assignment.
Make sure that you follow the professor's guidelines. Some professors are very particular and will only accept certain fonts, font sizes and margin widths. Also, doing too much is just as bad as doing too little. If your professor asks for 10 pages, don't give them 15. They might count off for it. If there is any questions on what they want, make sure to ask.
Think about your audience.
When you write you paper, think about who's going to read it. You're not going to write the same way for your professor as you would for your fellow classmates.
What do you need to share your information?
In most cases, you share by writing papers. However, you may find yourself sharing slides, music, or video. In those cases, make sure you have all the supplies that you need. If you need a computer or a television, make arrangements beforehand. Your professor won't be very happy if they have to stop class while you get ready.
Are you missing anything?
Read through your finished work before sharing. Are there any gaps? Does the information make sense? You might ask someone else for their opinions. It's easy to overlook your own mistakes.
Don't forget to proofread!
Spell check doesn't catch everything! After you read through your paper for content and flow, check it again for grammar and spelling mistakes. Again, you might ask someone else to look it over.