What is the mean of 'samma ditti' in Ariya-Ashtanga Marga?
If a virtuous person were to constantly reflect and expand upon even one strand mentioned in the Samma Ditti sutta referred by Suminda above, it will be for his long term benefit. 

For example one can take the section on the four types of Food and constantly reflect on that reality and confirm that view. 

Mr. Piya Tan has written an in depth commentary of the Samma Ditti sutta here.

http://www.themindingcentre.org/dharmafarer/wp-content/uploads/2009/12/11.14-Sammaditthi-S-m9-piya.pdf