I'd agree with most of what people have said. I've taught myself to climb trad, and have spent 2 years doing so. I don't have the cash to hire a guide, but climbing with better partners is key.
A lot of technique can go into one day in the alpine. My suggestion, like others have said, is find a partner about your level, and get lots of routes in. Read and re-read freedom and other "manuals", immerse yourself in different climbing literature, read about accidents, read about successes, and try and learn from them. When you can't get into the alpine, try and practice techniques in easily accessed areas. Push yourself when conditions are safe, and stay conservative when they're not. Be a proficient, strong climber in all terrain, not just 5th class. Don't depend on the rope, it's not always as safe as you imagine and impractical on certain terrain. Once in a while, guides are a good idea, they can give you useful tips gleaned from many trips, which you probably won't pickup in a useful way in an intensive week long course.
The biggest challenge for me is the mental side of mountaineering, overcoming irrational fears. Once you have a solid foundation in the basics for a variety of techniques, this will become the biggest obstacle. A 5.7 alpine route can still be challenging with all the right techniques, but the wrong head.
Question everything, think it through with a straight head, and stay stoked.
Sorry for the long post.