The wine wants incline to put, it is to let wine to be able to infiltrate oak plug, make oak plug unapt because wine is stored too long and dry, if oak plug is dry, its volume can shrink little, the likelihood can have air "while empty" and enter, affected the quality of your wine. So, when tilting, you just need to soak the wine into the cork. You don't have to stick to the data, as long as the wine can be soaked, you can tilt it to what extent you think it looks good.

At this point, you should think of the Wine rack. The wine rack is great for preserving wine, and showing effects.