Here’s an article about fingers and hands. Some people take great care with their hand and finger positions whilst others aren’t so fussed. Personally I think having well positioned and relaxed fingers can bring positive benefits to your playing.
This is a good exercise for developing embouchure control. Once you get onto the harmonic just let the lips totally flop and pout to encourage a relaxed embouchure. If you have trouble getting to the harmonic easily try tonguing each note lightly to avoid tightening as you ascend.
Tension is the antithesis of a good sound. It brings with it impurities and blemishes, causes problems with intonation, makes you sound like your squeezing your tone out like the last bit of toothpaste from a tube and impedes moving freely between registers.
Here’s an exercise I use with younger players to challenge and extend them with their scales. It’s more interesting and beneficial than just going up and down a scale. Of course it can be altered as required; various keys, ranges and articulation.
This is a fabulous tone exercise requiring great embouchure control, from my friend and mentor Elizabeth Koch. Start very softly, make a huge crescendo, slur up the octave seamlessly, glide across the semitone and diminuendo beautifully!
Here’s an article I wrote about how we breathe. Hopefully you’ll find it useful.
Taffanel once said the breath is the soul of the flute. Worthwhile keeping at the forefront of your mind.