I just tripped for my fifth time last weekend, it sucked. But my first time will always be memorable.
I was at my friend Jack's house, in his room which was sooo trippy. We were listening to Jefferson Airplane when I felt like my face was getting sucked away. I looked over to Jack and said "Hey man! I think I'm starting to trip." The vissuals just started to go crazy at that point. I could only see the upper half of his face normal. I peaked about an hour and a half later, the total trip lasted about 5 & 1/2 hours. It was a blast.
If I had any advice to give to new coming trippers, It would be to listen to Jefferson Airplane when you're tripping. It is crazy. The singer even talks about eating mushrooms in the music.