My experience is that high energy doesn't necessarily mean ADHD. You'll see soon if your daughter has the ability to settle when she is engrossed in something. For my son, who is normally like a tasmanian devil, his outlet is legos... The kid can sit for 4 hours, building. I was totally shocked when I figured this out! Your daughter probably has an outlet, too. So tip #1 is keep trying until you find it.
Our other secret is managing sugar and sleep. We manage sugar by limiting the refined wheat and sugary foods he eats. If your daughter is in the "white food" phase, there are whole wheat pastas that aren't as whole wheat tasting. We opted for whole wheat in general whenever possible, fruit and cheese instead of packaged snacks... I'm not saying it was the difference between Dr Jekyl and Mr Hyde, but with sugar my son is like curious george; without sugar, he still has a lot of energy but for some reason it just doesn't get channeled in such creatively bad ways. He has to have a nap, and the only way we could get him to nap at 2.5 was to drive him in the car. At night, one of us had to lay with him and pretend to sleep (or actually fall asleep) in order to get him to settle. He is also incredibly stubborn, so we've had success at getting him to respect bed time by doing things to make the rule the reason it was bedtime, not the fact that I said it was bedtime. e.g. We set an egg timer for some arbitrary time and when it went off it was bedtime. This helped us motivate my son to get in bed in time to read some books before the timer went off, and it also helped prepare him to calm down. Later in life we added a ticketing system where he received 5 tickets each day, and gained or lost tickets based on good/bad behavior. We also have to use the 5 minute warning to get my son to leave or switch gears as he gets pretty involved in things (this comes with that high energy).
The good news is that your daughter may always be high energy, but she will calm down as she gets older. At almost 4, our son is a pleasure to be around. He sleeps in his own bed all night. He can put himself to sleep. He can play on his own for long enough for us to cook dinner, talk like adults, or do other necessary things...