Decide which events will have a following or will sell out. These will be the tickets that will have the most value in the end, because there will definitely be people looking to buy a seat or a better seat at almost any price.
Try to order tickets online the minute they go on sale. Be sure to have your credit card on hand, as you are usually limited on the amount of time that the system will "hold" the seats while you purchase them.
Secure the best seats possible. The better seats you get, the more you will be able to sell them for. You will also be able to sell ordinary seats for a profit if the event has sold out.
Auction them on eBay. This is a great way to reach many buyers at once. Remember, some people follow musical artists and bands around the country and the only way to reach these out-of-town attendees is via the Internet.
Sell your tickets outside of venue the day of the event to those who can't get tickets or those who want a better seat. This can backfire if you don't sell the ticket or allow you to sell it for even more to someone who is panicking about getting into the show before it starts.