I like different verses from certain translations:
These two passages got me through my college days:
Proverbs 3:5-6 (King James Version)
5 Trust in the LORD with all thine heart; and lean not unto thine own understanding.
6 In all thy ways acknowledge him, and he shall direct thy paths.
Isaiah 30:21 (King James Version)
21 And thine ears shall hear a word behind thee, saying, This is the way, walk ye in it, when ye turn to the right hand, and when ye turn to the left
These are the two powerful passages that have been getting me through my life right now:
Hebrews 4:12 (Amplified Bible)
12 For the Word that God speaks is alive and full of power [making it active, operative, energizing, and effective]; it is sharper than any two-edged sword, penetrating to the dividing line of the [a]breath of life (soul) and [the immortal] spirit, and of joints and marrow [of the deepest parts of our nature], exposing and sifting and analyzing and judging the very thoughts and purposes of the heart.
Matthew 7:6 (King James Version)
6 Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.