Learn to combine vowels into a single syllable when no vowel has an accent. For example, "¿cómo estás?" isn't co-mO-es-tas but rather co-mUes-tas. An "O" is pronounced as a "U" in Spanish when it is followed by another vowel in the same syllable.
Combine a word-ending consonant with the vowel that begins the next word. For example, "las sopas en la cocina" is not syllabified as las-so-pas-en-la-co-ci-na but as la-so-pa-sen-la-co-ci-na.
Practice syllabifying "la siesta es importante en España." The proper pronunciation is la-sie-stae-sim-por-tan-tee-nes-pa-ña.