How deep into this do you want to go? You can write a book on this.
Since I can't tell what kind of "tips" you're wanting I'll give a few shorties.
Be sure to cut back the ground from around the foundation and apply the stucco down below grade. Unless, of course, you're going to be installing lath.....in which case you would want a drip screed and keep the stucco several inches from the ground.
Be sure to scrape off any "clinkers" left on the blocks by the masons. Get something really strong and scrape the heck out of the black till they are flat....you know...no balls of hardened cement on the face.
If you apply the stucco directly to the block be sure to use an acrylic admixture. For block it's not really absolutely necessary but it's always a good idea. For brick it is a must.
You can apply the stucco in two coats if there are no grout lines cut. If the grout lines have been cut it would be cheaper to apply a coat of Portland/sand.