Just don't load everything in one function call so that you can optimize FPS and Memory. Some debug information like FREEMEM function can also help you so that you can have a general idea of how much resource your program is using.
There is no "correct" way or standard in doing a certain program. It is up to the programmer to develop his/her own style and be comfortable with it. Choose a sample program and look at the way the code is organized. Some games I looked at are arranged by: Initialization, Main Program, Functions (input and output), Graphics (map and sprite), Sound, Data Arrays. Just don't load everything in...