DeNGVaT? WTF is that, I hear you cry? Well, it gives you named global variables, that you don't need to worry about importing/exporting, etc. and that you can "alias" to a normal numbered AGS globalint and thereby set through dialog scripts, interaction editor, etc.
It also has named timers, like the AGS ones but as many as you like and with a memorable name.
It also has a debug GUI for these, which will also hopefully do more debug stuff too in future (see below for some suggestions).