snap off blade and classic X-ACTO style blade
Nothing special to say about scissors. We use them all the time, and while we may be able to get by without them, some cuts are just more convenient with scissors.
When cutting with fixed blades, it's best to slice in one fluid motion with as long a stroke as possible. When using a rotary cutter, rather than rolling back and forth as you move along your cut, roll with a long fluid motion through the length of the cut, only stopping when you need to shift your ruler-holding-hand along the ruler so your ruler doesn't shift on you.
Other kinds of blades can be used, too, including tools for paring leather, or bigger cutting tools such as mat cutters, foot shears, and even a table saw can be used. These are tools for a later post.
Anything to add to the discussion? Please leave a comment.