J.P.
You can try some of the advice you got but do know that some kids are just early risers. My son has always been a great sleeper with great naps and night sleep but he always woke around 6/6:30 AM. He would also go through stretches of waking up earlier but then would go back to the normal 6ish time. FINALLY, now that he is almost 2, he is sleeping later to about 7 AM. We even got a 9AM one day!!! But try out some solutions and hopefully they will work.