That stone is a finisher. If you are only going to be touching up shave ready blades, she's all you ever need. If you want to hone up razors that are not shave ready, you'll need coarser stones. The 4/8K is popular; personally I use Spyderco Medium and Fine pocket hones.

Straight off the hone, I'd suggest at least 30 passes, but I usually do more like 50+. Stropping is a great way to get to know your razor, and you can tell how sharp it is by how much resistance you feel while stropping.

Stropping mid-shave is also a good idea if you find your shave quality going downhill. A lot of people will do their cheeks, then re-strop for the chin and upper lip.