In grade 7 math I think the best unit we studied was Integers and a bit of Coordinate Grid's because for me it was the easiest unit to learn. The unit that made me struggle was Fractions, Decimals, Percent, Probability, Circles, and bit more, it made me struggle because in the beginning it didn't make sense and by the end of the unit it made more sense but then we have to move on to a different unit.
For me to be successful in Grade 8 math I think I would try to understand the subject and start reading my notes and try to do extra math homework if I have time. There is nothing I would really like to learn this year only the things that you are planning for us to learn this year.
I did a few blogs last year and the blog I think I did well in was this blog:http://room43math09.blogspot.com/2010/05/find-mean-median-mode-range-and.html
Blogging REALLY helped me learn the units in math better because you read it in your note and type it down, two things that help me study and remember and at the same time it made math a bit more fun. In grade 8 math I would like to continue blogging again so it could help me in the math units we will be learning.