There	is	a	reason	Sherlock	Holmes	said	 this	line	so	often. 	If	something	does not	make	sense,	it	most	likely	is	not	the	correct	answer. 	For	example:	it	does	not make	sense	that	two	people	in	a	single	living	space	would	share	a	bed	when	it	is against	a	wall. 	There	must	be	another	solution,	perhaps	the	person	does	in	fact live	alone,	or	perhaps	the	other	person	sleeps	on	the	couch. 	 Use	information	to	your	advantage. Try	to	learn	everything	you	can	about	your	surroundings. 	While	it	may	be impractical	to	have	243	types	of	tobacco	ash	stored	in	your	noggin,	it	is incredibly	useful	to	learn	how	to	read	body	language,	how	to	read	text	quickly, and	how	to	spot	many	of	the	signs	I	will	discuss	in	part	two	of	this	guide. Understand	what	information	is	relevant	and	important	to	you. 	 Know	how	and	when	to	use	the	resources	that	are	available	to	you. There	is	a	reason	BBC's	Sherlock	is	on	his	smartphone	a	lot:	it	is	an incredibly	useful	tool. 	Do	not	feel	the	need	to	keep	everything	in	your	head	for storage,	or	you	will	just	drag	yourself	down	with	weight,	 when	there	is something	of	immense	value	called	the	Internet	available	to	you	right	in	your pocket. 	Make	sure	you	know	how	to	properly	and	efficiently	use	a	search engine. For	storing	of	information	that	you	find	useful,	I	personally	recommend	the free	tool	Evernote,	which	is	available	as	a	desktop	application	and	on	multiple mobile	platforms,	and	is	used	to	collect	articles	and	other	text	documents. Google	Drive	is	also	a	tremendously	valuable	tool,	and	can	store	any	kind	of	file online	and	in	a	folder	on	your	computer. 	 Do	not	jump	to	conclusions. Take	in	as	much	as	you	can	before	you	start	to	make	deductions. 	Start simply	by	observing. 	Take	a	sweep	of	the	entire	subject	you	are	attempting	to read,	and	then	another	round	for	good	measure,	otherwise	you	may	miss something	vital	or	mistake	one	sign	for	something	it	is	not. The	best	deductions	are	those	based	on	not	one	but	multiple	signs. 	Do	not just	look	at	a	person's	face	without	looking	at	their	clothes,	shoes,	posture,	body language,	personal	belongings,	 and	so	on	(especially	since	most	people	focus	on a	person's	face	when	talking	to	them). 	Look	for	clusters	of	indicators. 	 Know	that	people	are	not	all	alike.