When you see a free agent in TM, you must bid at once. You showing that you declare this player.
When the next round is starting, you bid at once. You 're showing your determination.
You're not bidding last sec like a newbie.
Don't bid when you don't know if you 'll be in the game, when the auction is ending.
Check the countries of your competitors and see what's the time they are sleeping
When you see that another "loaded" player has already bid, stay away.
When there are 3 expensive free agents and another "loaded" has bid on them, you bid in one of the three, showing him that you want a slice
Avoid free agents with special abilities. They attract too many bidders.

* some tips