vet / wet

/v/ - place the inside of the lower lip gently against the edge of the upper teeth (same action as /f/)
/w/ - round both lips slightly and blow the air out gently (don't let the lips touch the teeth)

Minimal Pairs
vain, vane, vein /veɪn/ - wane, Wayne /weɪn/
veil /veɪl/ - whale, wail /weɪl/
verse /vɜːs/ - worse /wɜːs/
vest /vest/ - west /west/
vet /vet/ - wet /wet/
vie /vaɪ/ - why /waɪ/
vine /vaɪn/ - wine, whine /waɪn/
vow /vaʊ/ - wow /waʊ/

Words using both /v/ and /w/
everyone /evriwʌn/, everywhere, twelve
viewer, viewers
wave, waves, waved, waving, wavy
weave, weaves, weaved, weaving, weaver, wove, woven
wives, wolves (not trying to say that wives are wolves...!)
whatever, wherever, whenever, whichever, however