Fill it halfway with books, and fill it up with lighter stuff.
1	Fill	fill	VERB	VB	Mood=Imp|Person=2|VerbForm=Fin	0	root	0:root	Discourse=joint-other_m:65->43:2
2	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	1	obj	1:obj	Entity=(71-object-giv:act-cf1*-1-ana)
3	halfway	halfway	ADV	RB	Degree=Pos	1	advmod	1:advmod	_
4	with	with	ADP	IN	_	5	case	5:case	_
5	books	book	NOUN	NNS	Number=Plur	1	obl	1:obl:with	Entity=(74-object-new-cf3-1-sgl)|SpaceAfter=No
6	,	,	PUNCT	,	_	8	punct	8:punct	_
7	and	and	CCONJ	CC	_	8	cc	8:cc	Discourse=joint-sequence_m:66->65:0
8	fill	fill	VERB	VB	Mood=Imp|Person=2|VerbForm=Fin	1	conj	1:conj:and	_
9	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	8	obj	8:obj	Entity=(71-object-giv:act-cf1*-1-ana)
10	up	up	ADP	RP	_	8	compound:prt	8:compound:prt	_
11	with	with	ADP	IN	_	13	case	13:case	_
12	lighter	light	ADJ	JJR	Degree=Cmp	13	amod	13:amod	Entity=(27-object-giv:inact-cf2-2-coref
13	stuff	stuff	NOUN	NN	Number=Sing	8	obl	8:obl:with	Entity=27)|SpaceAfter=No
14	.	.	PUNCT	.	_	1	punct	1:punct	_
