Strong/Powerful can be used, yes. "I take some powerful sleep medication so I can sleep through the night." "I'm on some strong pain killers because my knee hurts so badly" "I'm taking a heavy dose of decongestants because my allergies are bad." "I gave my son some really strong cough syrup so he could sleep through the night" and so on.

Electrical. There are few actual electrical shops in the US and we refer to the section of the store dedicated to electrical stuff as the electrical aisle(s) or electrical department. For small electronics/etc. we do have some electronics stores left, though most of this is done online now.

With these types of phrases, the only difference is generally due to context. The focus of what you are puzzled/confused about is what determines which you use. However, given that it's such a generic distinction, you can use any of the three without concern. It, for most English speakers, comes down to what "sounds" the best. In that sense, the most correct phrase is "to be puzzled about" something. Something confuses you. They all mean the same thing in the end. Let's look at "mad/angry" for example: I'm mad about an event that occurred in the past. I'm mad at a person for being mean to me. I'm mad with all of this craziness going on in the world. This particular context is the most iffy. Stick to "about" generally.

There are a few answers to this that can be acceptably used. In a small craft, "to steer" or "to drive" the boat are acceptable. In a large craft, the verb "to pilot" the ship is normally used.

When someone was younger, lots of seemingly random events happened to them. It was, until now, a confusing list of events that made no sense. Whatever event just happened has explained some of the randomness from before. "It all makes sense now"

"Keep blessed" is not something you are likely to hear in English. Forget this phrase. "Stay blessed" on the other hand, is a phrase you might here. It's usually spoken with religious belief in mind, but can also just be a generic phrase. If you say this to someone, you are expressing that you would like for them to continue to have good things in life. You would like for them to stay safe and feel comfortable. If you say it with the religious beliefs in mind, you are expressing that you believe that your deity of choice is watching over the person (more or less with the same sentiments previously mentioned).

A horoscope is a short, broad prediction of someone's future and their character. It's usually based on what period of the year in which they were born (along with where the stars were in the sky). Zodiac is a term that encompasses the periods of the year and star alignment mentioned in the horoscope definition. It provides names to the different periods. Star sign is used to refer to a single period defined by the zodiac. "Aries" for example.