Well, Acrylic, i have those problems too lol but i'm getting use to it.
it's explained some where in this thread but i can't find it.
Ill try explain as good as I can but if i make a mistake, some one will correct me :P...
Serbian has 7 cases: Nominative, genitive, dative, accusative, vocative, instrumental, and locative.
This is the way i remember for using some, especially Locative. It is similar to Location.. so when you are talking about location and other stuff it usually falls under that case and ends either in an -i or an -oj (if the ending is -ska). so Dacanka said she lives in Turkey so that would be: Zivim u Turskoj
-zivis u Crnoj Gori
-zivimo u Hrvatskoj
-zivim u Srbiji.
-zivite u Grckoj
as far as i know dative and accusative are regulary used lol and i usually get mixed up with them...Genitive is quite easy.. it's like possesive and a lot of prepositions fall under the genitive case. how I remember is when the word "of" is infront of a noun, in Serbian that is usually genitive. but not all the time..
http://en.wikipedia.org/wiki/Serbian_grammar
that will explain more