Accent mark

If you follow the below simple rule pronunciation in spanish will be easy.

Condition	Stressed syllable	Example
word ends in a vowel	last but one	dibUjo, planEta
words end in -s or -n	last but one	orIgen, entOnces
word end in a non vowel	last	encontrAr, ustEd
Other cases	indicated by an accent mark	séptimo, corazón, jamás, preguntó

The Spanish accent has two main uses:

1.To indicate that the normal rules of word stress are being overridden.

2.To distinguish between otherwise identical words.

aun	even, including	aún	still
de	of,about	dé	he gave
el	the	él	he
mas	but	más	more
mi	my	mí	me
o	or	ó	or(when used with numbers 1 ó 2)
se	oneself	sé	I know or be
si	if	sí	yes
te	you	té	tea
tu	your	tú	you

Accents in interrogative words:

como	how	cómo	how?
cual	which	cuál	which?
cuando	when	cuándo	when?
cuanto	how much/many	cuánto	how much/many?
donde	where	dónde	where?
que	what	qué	what?
quien	who	quién	who?