Do not reduce the page to display all images, the proof must be a true representation of the file. The lazer proof is what both you and your output person double checks. If the document is in color then two lazer proofs must accompany the disk, one proof is in composite form, the second is the separated form. Please mark color- process or spot. Confirm in advance that the program you use to create your document is compatible with your printers requirements.
Heavy users can supply their font library one time, reducing time on future jobs.
When defining colors, review a color tint guide or check with your printer before inserting values in the color palette. Your color monitor is not accurate. A key issue today is who is responsible for trapping. Your printer should always check this information any way. Files not properly trapped don't print well.