Well I've heard that Alchemy is a good way to get lots of gold,and I'm trying to get all the furnishings for rosethorn hall.
But the problem is that I just can't seem to figure out how to do Alchemy! After beating the main quest I had tons of daedric ingredients in my inventory such as Void Salts,Daedroth teeth and Daedra hearts etc... But when I go to my full alchemy kit,I can't figure out how to make any good potions....
Any help would be greatly appreciated.

First, equip a mortar and pestle. This opens the alchemy dialogue. Other alchemy apparatus will automatically be equipped if it is in your inventory.
Now you need to add two different ingredients that both have the same effect - like restore fatigue. Mouse over the ingredient and the effects will be listed. Any effect can be used, but you need a minimum of two ingredients that can produce the same effect.
Once you add the first ingredient and are adding the second ingredient, the list you can select from only includes items with a matching effect. There is a button to change this default behaviour.
You can create potions with multiple effects by adding more ingredients. For example the first two ingredients are for a shield, one of those ingredients also has restore health, so you add a third ingredient with that, then you add a fourth ingredient with restore fatigue, now you are creating a potion that restores health, shields and restores fatigue.
Since you are normally limited to drinking a maximum of four potions at once, these multiple effect potions let you have more than four effects active at the same time. They also stack with your spell casting so the effects add up.
You can also create potions with negative effects (damage health ). To use these, equip a weapon and then click on a negative potion. The potion will be added to the weapon and will be used on the next creature you attack with that weapon. Arrows can poisoned this way and you can drop an enemy before they can even reach you, or silence that mage to keep them from casting spells.
Similarly you can create negative potions with multiple effects. e.g damage health, damage magicka, fire damage and silence.
Once you realize how a few well timed potions can change a losing battle into a winning situation, you'll find yourself spending countless hours gatrhering ingredients.
