It is easy to win a fantasy sport, but it takes time and preparation. Here are certain steps that are needed to be taken before the draft starts.
The first thing to do is to come up with a depth chard of every team participating in the league. This should be done before pre season starts. It is better that you write it yourself, rather than printing because you will get familiar with the teams and changes in them.
Check the settings of your league. See what state categories are worth points and their value. Find out the positions you need to draft and how many. This is a simple step but most people don't bother to check this thinking that their players are good everytime.
Go position by position and player by player. Try to find out how they will perform in the coming season. Consider the stat categories. There are certain points you need to consider like, if a pitcher gets a lot of losses, it will not count in most leagues, because these leagues don't count against you.
By looking at the past 3 years of the players, and taking the account of changes in the offseason that affect the players stats, you can actually come to a reasonable projection on players. For example, trading of one player to another team, or introduction of a big player into team, in injury or a key player in the team getting injured.
After finishing the whole projection work, rank each player by position. For this, you require value for each stat category. Add up all the stat category values and come up with a total for every player.
Do not forget to put the players into tiers. Look at rankings and group players according to same values. This is important as you won't draft a player if four or five players with about same value are right behind him.
This is the time for the draft, but it will also require research. Match up the trades as per the value of each player you have got. In case of proven players, it is better that you stick to your values to atleast half way through the season. Always remember that baseball is a long season game, and sometimes player don't start out great, but proves to be of real worth in long run.