Easy money
Go into Club/Stadium Facilities/Stadium Expansion. Change the stadium type (rounded corners, oval; this will cost you money) and select "Build Stadium". Do this again (changing the stadium type, build it), and you will receive money. Note: Do not do this if you are thinking about building a new stadium.
Finding good released players
At the start of the game or after any season finishes, go into the transfer market and search with the following details:
All Players
Transfer Limit : #0
Min Potential : (whatever standard of player you need)
Position : (whatever you need)
Side : (whatever you need)
Age : Any
Search : All Counties
After doing this, the game will display all the players above your potential level who have been released. It is possible to sign Henry, Terry, and Ronaldinho this way. Note: You may need to wait until a particular player becomes available.
Morale
Always check the player status screen before you sell a player. If a player has a close friend on the team, this will cost a lot of morale. This could be disastrous if the remaining player is one of your stars.
Easy money...