There is lots of information on the internet about both....but i wouldnt recommend researching too much about them.
Although many have probably had great success with them powered by the love to experience their true selves and God. By Guru's grace from my own experience just following the following advice from guru Ji has worked a treat.
pa(n)chaa kaa gur eaek dhhiaan ||
The chosen ones meditate single-mindedly on the Guru. 2
So providing you are laying the seeds with doing good and not hurting others (physically, mentally and spiritually) and you feel a thirst to 'seek the truth' and nothing but the truth, then just following the above is the best advice.
meditate single mindedly? how can that be done when you're so busy with normal life, or when you close your eyes at night, the mind is still flowing with a zillion thoughts about life. How can we meditate single mindedly in these conditions?
pick a mantra, focus on it in your mind with eyes close....when the mind wonders elsewhere...shake it off and return back to the mantra. keep practicing until the mind starts to relax and leaves you alone.
Then a mantra isnt needed and you can then focus single-mindedly on god and be in silence and open up to the Amrit that flows through you and everything else
