I always feel much more enthusiastic and optimistic after a couple of beers. I don't know if this is something that effects everyone, or if it's just me. I don't mean getting pissed, just a pint or so normally does the trick. Generally I'm fairly optimistic, but after just a small amount of alcohol my mood changes and I feel like I can achieve anything (within reason, like). There must be some people who feel like this all the time, these must be the people who really make it and achieve all their goals.
There must be a way to get the feeling without the drinking. I bet it's something to do with relaxation (something that is hard to sustain after 2 hours on the M6).