I remember when I started to sketch that I was afraid of erasing. But once the realization kicked in that it's just lines on paper I wasn't afraid of using the eraser.
The other thing you could do in a situation where things seem to have gone wrong is to just throw the sketch away and start from scratch again. This is a somewhat effective strategy for making things not look "overworked". And it shouldn't be much of a bother to start over if you sketch loose and quickly.
In the end, it is the result that matters. The journey to get there may have many paths and take many tries. Using the eraser or just starting over is like exploring the many pathways. :3 *philosophical*
Thank you for the insight, encouragement and tips. I'll definitely take 'em into consideration. You're right - some of my pieces do look really overworked, I'll just take 'em as practice and work on improving. :3
For better comments and less "feelgood lies":
Why did I fav this artwork?
It's the first Fav I've chosen in dA. Is there any special reason for that? To be honest: No!
But this tutorial gives some good insight in an artist's head and how you bring your ideas onto paper (or whatever medium you're using).
But there's something special in this tutorial: I like the way you think. You don't start with a construction, you're not afraid of trial and error, in fact you try to encourage others to try and correct it, if it's bad.
And I like it that you're telling one of the ugly truths: A crappy base sketch can't be saved by fancy colours
It's helpful tutorial, hence the Fav