HL's advice on living life is actually one of the best ways to witness to others - through how you live your own life. I remember, before I became a Christian, that there were just a few people I had known who acted different than everyone else. That kind of witnessing was more effective than any Bible thumping.
Lurk about in the Christian Answers forum. Look at the kind of questions that are asked and ask yourself - would I be able to answer this? How?
Don't expect people to listen to you and become Christians. You might be surprised at the resistance you get even from your own family. There's a thread here now about this called "Spiritually attacked by my own FAMILY". Not to be discouraging, but know when to, as the bible says, shake the dust off your sandals and move on. The impression you leave may not have an immediate effect but eventually it may.
I'm always impressed by those who can quote Bible by chapter and verse off-the-cuff. I've never been able to do that. I know the verse is there but I always have to spend time looking for it.
Before I was a Christian, I thought most people were Christian (in the States). Now I know how wrong I was. We have our work cut out for us!
To preserve the government we must also preserve morals. Morality rests on religion; if you destroy the foundation, the superstructure must fall. When the public mind becomes vitiated and corrupt, laws are a nullity and constitutions are waste paper. Daniel Webster, 4th of July, 1800, Oration at Hanover, N.H.