Hurray so you bought some lsd? Great! Have fun but be calm and remember the following things:
Take only a tab or 2 for your first time.
Avoid talking to parents. You may sound like a retard.
Be prepared of the possibility of losing A LOT of sleep (maybe a whole night) and being completely burnt out the next day.
Do not look at your reflection at night or in a dark room (you'll regret it)
Play violent videogames.
Don't waste you're whole trip inside! Go for a long beautiful bike ride or walk.
OK, so that's it for daytime, but now for surviving "The Night." You will get into into bed thinking how the hell WON'T I be able to sleep? I feel so chill! Wrong. Oh so wrong.
Be sure to make friends with as many objects as possible in your room. Refer to them as "Mr. Ceiling fan," or "Mrs. blinds" (they like that)
You may come to the conclusion that you for whatever reason your trip will never end. It will, trust me.
If stuff in your room gets too crazy or scary just close your eyes, get up and turn on the lights.
The night sucks. The only way around this is spending it with a friend.