just a couple of things my friend does:
4) music isn't always best loud, infact quiet music can be very conductive to experiencing the trip more fully
3) sitting cross-legged on the ground can be far more beneficial than sitting in a chair
2) always have a clear intention, question or some other intent, meditate on it
and... most importantly.......
1) AIM FOR LOVE!!!
srsly, you don't want to visit the dark places dmt can take you to, its not worth it.
shoe
ॐ भूर्भुव: स्व: तत्सवितुर्वरेण्यं । भर्गो देवस्य धीमहि, धीयो यो न: प्रचोदयात्
Love, Gratittude, Compassion, Fearlessness!