Something I always forget to do in titration calculations is to convert cm cubed into dm cubed. To do this you must divide the cm cubed value by 1000.
You ALSO need to know your Mass= Mr X Moles formula, I think.
If you know the n=vc triangle, always write it down next to the question. If you're stuck and don't know what to do next, just try and calculate and find out whatever you can about the reaction, even if you don't think it's relevent to the question.