i did economics this year and got a pretty good score (47) (with not too much effort, to be honest embarassingly enough) and i would say the key thing is to think through everything clearly and logically. economics largely is common sense I would argue, and if you approach every analytical problem (vs. definitional) from a very basic D&S angle, everything will work itself out, and it isn't imperative to rote learn everything (but do rote learn stuff like the definition of all the economic objectives etc). with analysis questions, there is no way you can not know an answer as even if you can't give the 'correct' one, as long as you can prove your point theoretically, there is definitely value in that. so really, strip it down to the basics and the entire subject is easy as pie.
in terms of recent things/news, it is probably best (though definitely NOT necessary) to focus mainly during the march period (as this is when the exam was written), and the period preceding the exam (shows good knowledge and a maintenance of current conditions). only remember things that you find easy to remember, and don't think it's necessary to remember shitloads of stats. the key ones throughout the year will put you in good stead.
most of all, i hope you have chosen economics because you enjoy it, that can only be of benefit to you, as everything will come very easy to you.
hope that helped
EDIT: oh i forgot, i found the Salla CPAP guides very useful, but I didn't use any one text as a complete and utter guide. I found the text book (Economics down under) heinous.