This is a simple to setup site for selling/giving away while building a mailing list: PDF's, tickets, videos, music and subscriptions.
5. If you have information that changes on a regular basis then maintaining a blog may be a good option. For example if you built a following of people who watch what you are buying/selling you could do your trade each day and then post a announcement about it to your blog and your subscribers would then follow your lead. I don't know if having a bunch of people do what you do right after you do it would be a good thing but if it would be then building a large following of other day traders would be good for marketing your books to once they trust your trades to be well researched. I build blogs for authors. Check my latest one out: http://www.danamanciagli.com/