This is probably the thousandth thread on encouraging Bitcoin adoption lol.
When it comes to Bitcoin adoption, I think the best thing that can be done is education, because if you walk up to someone on the street right now and ask them about Bitcoin, they will not have the slightest idea what Bitcoin is. People need to be educated on Bitcoin and that will encourage adoption, start by posting the "What is Bitcoin" video on your Facebook wall. Tipping can also help.