I was wondering how you would all fare, because one of my professors showed the game to me, and I told him anyone who reached the end could win the game. He then told me most people he showed it to have a hard time reaching the end.
As for what I do, I balance the budget by increasing revenue. The balance doesn't have to be a surplus, but the deficit should be at least in line with the growth rate. I ignore everything else. Comes the last month, and I use the old political trick of dropping taxes.
The max I've reached has been about 85%. As my professor said, "this result places me among democracy's greatest heroes like Saddam."
I played the game using several strategies and with different goals. In one of them I decided to drop unemployment and I won with 60% with no dirty tricks.