I try not to cage my meditation with a kind/style or even duration. In the beginning years I did practice Kriya yoga. It is very specific with exercises, breathing techniques and duration. I used to do mantras consistently. I found all of this very helpful in my beginning years. It kept me on track and developed my discipline. But after so many years – my meditation has now just poured into my everyday existence. I connect rather quickly to my inner Ancient Mother space. I can close my eyes and fall within this space a hundred times a day. My meditation sits in the front of mind and is now my first ultimate truth – while everything else sits behind that. If I find I forget – I read, I sit, I breathe, I do my asanas, I call out to my Guru. I use all my formulas – until the truth reappears. And usually this happens rather quickly. With large moments of suffering it may take a day or two. But I find now I can return home to my God space faster than before. I think because I did plant the seeds so deeply before. Sooooo, I would say start with 10-20 minutes a day. Chose one mantra. Chose one breathing technique. Stay with this for some time. Months – years. And when you outgrow it – you will know! You will know when its time to shift. Then one day – it will just become you.