Soldering can be tough. The forming of large drops comes from the iron melting the solder from the end of the roll, but it doesn't "stick" to what you're soldering, causing the novice to keep feeding in more solder, and the iron keeps melting it till you have a big blob, but no actual joint. Before you touch the iron or gun to the solder area, make sure the heat tip is full temp before you actually make contact. When you see the existing solder start to melt, feed in your solder from the end of the roll at that time. Keep a paper towel or piece of paper to take the temperature of your solder tip. If it doesn't cause a burn mark on the paper, it's too cold to solder with. And if it's too cold to solder with, the novice keeps holding the tip on the part till he ruins the part. It might not be hot enough to melt the solder, but it's surely hot enough to ruin the part. The less time you have the tip on your solder area is the less likelihood you've fried your component.