these tips are from my own experience :
0- get the mypes thing and you get a bonus ( 300 E)
1- play as much matches as you can , even if you lose .
2- build up 2 strong teams , try making the 2 teams balanced .
because the more valuable players you have , the more money you get . eg: i used to get 1.1 for winning 650-700a for getting a draw and 400-500 for loosing , after i built 2 squads and used mypes , i get 2.3 for winning , 1.7 for getting a draw and 1.4 for loosing ; though the most expensive player in my squad was piatti , 3.5 mil transfer fee .
3- never sell players who still have matches in their contracts .
4- try making all your players run on 20 and 50 matches contracts .
5- save up and buy a valuable player whose arrow is blue or purple , this way you will be getting him for the least price and wait for him till his arrow becomes red , when his arrow starts toing down from 8 to 7 , sell him , for eg : Gallas was 15 mil , after one week he became 23 mil , i'm lucky if i bought him for 15 mil
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6- enter as much competitions as you can .
i hope this helped .