[sm666]

I know it's not going to be the same for everybody, but for me the bad trips come when I get stubborn and try to fight the trip(I had some suicidal thoughts - luckily they seems completely retarded at the time). If I go with the flow and just let my mind take me where it wants it's been nothing but good vibes.

I would say start off with 1 hit, feel it out, you'll be able to control things more, for me the more LSD I take, the more I loose control over the trip.