Hi..
1. First of all go through MAZIDI clear all basic thing.
2. Learn all syntax n try to do basic interfacing using assmbly language with the help of keil and proteus.
3. when you are confident about ur work go for hardware interfacing.When you know each and every thing you are able to do any project.
4 After assembly go for c programing
the tutorials which are given here are usefull to start
sushilkumar