Yes, there is such a thing as too much brushing, especially if you have sensitive teeth, too much brushing can irritate them. Otherwise, overbrushing might lead to sensitive teeth.
It’s okay to brush more than just morning and night. That is, if you want to brush more, brush after each meal and even after each snack.
Many dentists are realizing that flossing is more important that brushing because food can get caught in your teeth and stay in there for weeks or more, decaying your teeth and causing plaque, bad breath, and other problems.
I don’t think electronic toothbrushes are inherently better, as long you you brush thoroughly, a regular toothbrush should be fine.
A water pick, brushing, then a gum brush might be overkill. Again, if you mess with your teeth that much, they may start to get overly sensitive and swollen.
Here’s my advice: brush and floss after each meal and use Whitening Now to make your teeth really white. That is my routine and my teeth have never looked better. Whitening Now works amazingly well. And you can try it for free at the site below. You got nothing to lose, and it really works. Check it out.

Yes power toothbrushes are better for removing plaque because it moves faster than your hand does. So it does more work in less time.
Any power toothbrush is good. I would recommend any power toothbrush that moves in a circular fashion.
Such as Oral B triumph or anything similar to that. Dont use sonic brushes because it doesnt work well for everyone.
Always use a soft brush or a power brush. Let power brushes do the work for you, hold it gently on your teeth towards the gumline and move it slowly around your mouth.
With manual brushes use a slow circular motion, not pressing hard at all. Brush 2-3 times a day morning and night (after eating) or after every meal or snack. Brush 1-2 mins every time.
You cant over brush as long as you do it gently.
Use a fluoride toothpaste, buy a tongue scraper, and floss daily.