When you integrate quotations in this way, you do not use any special punctuation. Instead, you should punctuate the sentence just as you would if all of the words were your own. No punctuation is needed in the sentences above in part because the sentences do not follow the pattern explained under number 1 and 2 above: there is not a complete sentence in front of the quotations, and a word such as "says," "said," or "asks" does not appear directly in front of the quoted words.
Dividing the quote may highlight a particular nuance of the quote’s meaning. In the first example, the division calls attention to the two parts of Hamlet’s claim. The first phrase states that nothing is inherently good or bad; the second phrase suggests that our perspective causes things to become good or bad. In the second example, the isolation of “Death thou shalt die” at the end of the sentence draws a reader’s attention to that phrase in particular. As you decide whether or not you want to break up a quote, you should consider the shift in emphasis that the division might create.
Some assignments are given page count requirements instead of word count. A normal, typed, double-spaced essay without footnotes is said to yield approximately 250 words per page. Page count requirements are open to cheating by doing things like extending the line height, widening all four margins, increasing the font size or using a wider-style font, using footnotes, and other style elements that help spread the content over the pages. While this may satisfy the requirement, keep in mind that your instructor is expecting a certain level of content in the essay, and an incomplete essay stretched over the required amount of pages is still an incomplete essay. Conversely, an essay that blathers on will still seem to blather even if the student creatively crams more words into a smaller space.