Getting tired of using sliders or the color wheel in the fill and stroke dialog to change the color of objects? Think it's a hassle to change the stroke width? Try this...
Here, the two objects I've drawn have my default settings for fill and stroke, a light gray fill and a black, .5 pixel wide stroke.
Which is also designated on the bottom left.
What we're going to do is use the color bar, chose a color and left click, hold and drag.
You'll see this cursor and the fill or stroke bar get highlighted along it's border when the cursor is in position over it.
Release the mouse button and you've got your color. Actually you can drag the color onto the object itself to change it.
Again drag and drop blue onto the stroke bar, but notice the number next to the stroke bar.
Right clicking on it opens a stroke width dialog, where you can save a lot of clicking.
Another important click saver: Right clicking on either the fill or stroke bar brings you a bunch of option, including a quick way to remove fill or remove stroke.
Inkscape is well thought out and I'm finding the UI to be a pleasure to work with.
Cheers