This post is divided into two sections - the first is my personal opinion as native speaker, the second is a textbook explanation. Hopefully, it will get you closer to a good answer. I agree with the beginning of the last post. In my personal experience "another" is used to indicate more of the same item, or something that has already been mentioned: "May I have another slice of cake." or "This cake is excellent, may i have another slice?" Other is used to indicate some alternative to what has already been mentioned. "Will you go to Sochii this summer or to some other location?" The problem is that I've heard native speakers say "Another" when they present an alternative that is in the same category as the original option. In the last example we are always talking about the category of "location." So for a native American speaker, the sentence "Will you go to Sochii this summer, or to another location?" sounds just fine. That said, here is an explanation from Practical English Usage by Michael Swan (The international student edition, page 53 - 54) It provides more information that is necessary, but hopefully it will be helpful. 1. Spelling of another Another is one word He's bough another car. (Not - he's bough an other car) 2. Additional, extra: Another can mean 'an additional, extra'. It is used with singular countable nouns. Could I have another piece of bread? Another can be used as a pronoun without a noun, or with "one", if the meaning is clear from what has come before. "Those cakes are wonderful. Could I have another (one)? With uncountable and plural nouns we normally use more, not other. Would you like some more meat? (Not other meat) Would you like some more peas? (Not other peas) However, we can use another before a plural noun in expressions with "few" or a number. I'm staying for another few weeks. We need another three chairs. 3. Alternative (An)other can also mean (an) alternative "besides this/these. I think we s

well, one way to use another is to ask for more. Example: Would you like another cookie? It is the same as asking Would you like one more cookie. Other usually is specified. Example: Not the blonde girl, the other one. And another can be used to show a various amount example: Choose another girl who isnt blonde.... its a little hard for me to explain exactly:/ i just know where to use it, it may be something that you must pick up just from listening to english.