This time I feel like doing a crazy and useless tutorial, based on the last episode of my webcomic and using a combination of Inkscape and GIMP I will create a space ship jumping into hyperspace (uswd in the last panel of the comic).
The first step is to make a panel for the comic. Following the style of my comic, I use for that a rectangle with rounded corners colored in a light blue gradient.
So let's do the ship! For the geeky feel I want to make it look like the Millennium Falcon,
so I start with a circle, made with the ellipses tool while keeping the Ctrl key pressed
And a second, slightly smaller, circle
Select both of them (with the Shift key) and using the Align and Distribute dialog align them at the center of the bigger circle.
With both of them still selected, substract the small circle from the big one to get a ring.
Duplicate the ring (Edit > Duplicate.
And resize the copy (keeping the Ctrl key pressed to preserve the aspect ratio) to make it smaller.