Hi Angela. How frustrating! Yes they have these cut-off values which are used to determine the diagnosis.
Pre-Diabetes, to me at least, does mean that you are heading towards full-blown diabetes -- although arguably it is a bit like saying "you're just a bit pregnant".
The good news is that this is a golden opportunity to step up, be proactive and stop this thing in its tracks. Please don't take it a sign to relax and wait till things get worse.
I think about it like a dam holding back dangerously rising water levels, while hairline cracks are starting to appear on the dam wall. It is far easier to lower the water pressure and shore up that dam BEFORE it bursts... if you act now, there is every chance that the **** will never burst.
I'd say that what you eat and how physically active (on a regular basis) you are, will be the major keys. And physically active does not have to mean the gym (unless you like to) but regular walking, taking the stairs etc...
Diet/food-wise I'd suggest using a BG meter before and 2 hours after each meal, plus keeping a food diary to determine which foods have the biggest effect on your BGs. For me that means I eat a low-carb/high-fat diet... real whole food with minimal processing -- you may find differently.
You are your own best advocate and knowledge is power.
Good luck.