I recently realized I am dependant on pencil and eraser whenever I want to do a complex picture. The fact is I actually do a lot of anatomy and perspective errors when drawing and spend a lot of time correcting them, but now the time required for corrections in my pencil pictures is really getting out of hand, and I correct so much that I feel I'm no longer being honest about my skills.
So I am going to set aside pencils for a while and experiment more with undeletable media, with no pencil sketch underneath. For example with India ink, which I haven't used in a long long time...