I took lsd 1 time and tolerated it well. What are the long term effects associated with cont'd use?

Drug use = dangerous. Your question implies a tacit approval for recreational drug use. This is never appropriate. Lsd & other hallucinogens (psilocybins, pcp, wet mj, ecstacy) can be very dangerous to your general & brain health. There is absolutely no benefit to using these drugs. One bad trip can lead to a life of schizoaffective disorder and a vegetative state.
Bad things. Chronic use can lead to depression, violent behavior, anxiety or a distorted perception of time. Flashbacks can be very disturbing, and the delusional changes can lead to psychosis and schizophrenia. These things lead to a lack of success in school and work.