Begin with a loose sketch, mapping the basic outlines - stem, leaves, flower head, vase. It starts similar to the daisy.

The petals of a rose can be quite tricky, so map out the outside with a circle, mark where your center is, and then work towards the center. Don't just count them :) Make sure the outside of the petals are accurate if you wish to make all the other petals fit on the inside.

Little by little it will take shape. Lots of adjustments here and there should be expected, so if it takes some time, don't worry. Enjoy the process.

Sometimes I think certain points in the flower as an "landmark" or "anchor" when lots of "line action" seems to happen around that area. I make sure that those important areas are the most accurate so as to not throw off the other lines that depend on it. For example,  I may notice that several petals may touch a landmark's right side and base, or, the center of the flower is the starting point of every petal, etc. It's good to double-check your subject, study it often, and keep things in proportion to each other.

Fill in the "chunks" of dark, medium-darks, and all the shades in between. I've used the cross-hatching technique to shade. Sometimes I'll let the curve of the petal dictate how I lay down my lines. Kind of like a plaid blanket resting on a wavy surface. Some lines radiate from the center, others curve and bend.

The leaves are shaded with diagonal lines all headed the same direction. I did not draw much of the vase because I did not feel that it added to the rose. Nothing needs to be overly complex or detailed. Some of the simplest drawings can speak volumes because of what they say, not how they say it.

Once you've finished tweaking and shading everything, erase the smudges from around your drawing.

Ta-da! There's your rose!