Given the background description of some cooking related query, summarize the question into a title

How can I make hot chocolate drinks made from using instant hot chocolate sachets taste less watery?I work in an office with limited kitchen appliances, we only have access to a tap that dispenses boiling hot or ice cold water and a microwave.I have tried adding milk but that just takes away a lot of the chocolate taste.
How to make Instant Hot Chocolate Taste Less Watery

What are the mechanics of water boiling over? How can you stop it from happening? Is it more likely to happen with certain ingredients? Which? How does the amount of water effect the likelihood of water boiling over? What role does burner temperature have? Will it only occur during a rolling boil?This is brought up by this comment by MeltedPez in one of the cooking pasta questions: The only other argument for using more water is that less water is more likely to cause the pot to boil over. Basically the starch in the pasta makes it easier for the water to form bubbles that collect and spill over when not paying attention. I've found that with a very low pasta to water ratio can end in a messy kitchen. This seems very counter intuitive to me initially, as I feel less water should make it harder to boil over the edges.
What causes water to boil over?

When I have made white wine sauce at home, I have been unable to replicate the classic 'round' taste, with the 'long' aftertaste. The taste I'm looking for is typical for restaurants serving it with white fish, like cod.I have a theory that this particular quality has something to do with the preparation of butter, e.g. caramelization.How do I make restaurant-quality white wine sauce?
How do I make restaurant-quality white wine sauce?