Descriptive Title - Include the abbreviated names of the players involved in the title so people know right away whether or not they can be of help, e.g. "SDavis/DDavis for Moulds/Moats/RandEl"
Rosters - Post your complete roster, as well as the rosters of those involved in the proposed or potential trades. There might be a trade you hadn't thought of or a better player to drop.
Scoring System - People need to know what yards, receptions, touchdowns, etc. are worth before they can tell you whether or not one player is better than another for you.
Be Patient - You shouldn't rush into a trade or waivers anyway, but remember that the people who are going to help you are probably in 5, 6, 7 or more leagues, and have lives of their own, so it may take some time before someone responds.
Dynasty & Keeper Questions should be posted in the Dynasty & Keepers Forum