Sentence:  It seemed to me like there was too much to tie up and <WSD>mop up</WSD> in Hitchhiker, so that trying to write it like that would just be a continual task of knotting up the loose ends, when in fact it might be better just to think of something completely different. 
Meaning of the word marked with <WSD> tags:  To finish something off; to apply a finishing touch