Ok, the first quest that I need help on is 'A venerable vintage'. You start this quest by finding shadowbanish wine in random loot, and then a journal entry pops up on the screen and says 'This wine looks quite old and valuable, I should try and find someone who knows a lot about wines".
I've already been to anvil, where if you talk to people and select "rumors" some people say that the guy at Counts Arms inn knows his wines, but there isn't an option in his dialogue menu that says "shadowbanish Wine" or that says anything that pertains to the quest.

the second quest that I need help on is called 'When the vow Breaks'. You start the quest by killing bandits in tombs and if one of the random weapons that they drop is called 'Rockshatter' and you pick it up, then the quest will start.

Neither of these quests have "Quest arrows" that tell you where to go, which is why I am asking you guys for help.

I've started both these quests and haven't really progressed them at all, maybe try raising the guys disp?

1) A venerable vintage:
Hint:
I belive you should go to the inn near Imperial City.Forgot it's name.

2)When the vow breaks
Hint:
Visit the farmhouse near Anvil.Speak to the Nord Woman.

The inn near the Imperial City would be in Weye, which is just west of the Imperial City. Once you talk to the right person, the story progresses from there.

alright, thanks HyPNO and Elongar, i've just finished 'When the Vow breaks' and progressed pretty far into 'A venerable vintage'.