
Certain surefire techniques to begin to learn & locate bandhas include the preparation for nauli kriya. David Williams loves this and readily teaches it as a tool to guide the student to uddiyanabandha & mulabandha: standing and leaning with hands on knees and straight arms, exhale fully and hold, while you draw the abdomen in & up, almost vacuum-like. In the actual Astanga practice it is more subtle than that, as we keep the breath moving, but nauli prep lets the mind and body wrap around that idea of stillness at the belly. Specific asana also assist in pinpointing the desired feel of bandhas engaged, such as downward facing dog/adho mukha svanasana: the region of the abdomen automatically hollows out and we can direct breath more easily into the ribcage rather than the belly. JalandharaBandha assists the upper throat-chin lock but is very subtle during the asana practice to ensure controlled pranayama and neck alignment. Here again, downward dog can give guidance to locating jalandharabandha especially when nose/navel dristi is applied.
Bandhas are integral components of ujjayi pranayama as well, working in tandem. The great deal of prana we are delivering to the body, is also offered bandha support and guidance. From the start, the sun salutation/surya namaskara sequence gives rise to all elements...dristi, ujjayi breath & bandhas coalesce and we are supported and lifted and present.