Get your troops out of base
First thing you want to do is get your troops out of your base so make sure your APC are gathering.
Add ressources you want to send
The second thing you want to do is add ressources you want to share with players.
Add the ressources
Then you need to add products you can send to that player.
Get rid of extra ressources
Get rid of non needed ressources by upgrading buildings which need these ressources. Per example, you could send food to your cantina or fuel to electricity factory.
Advise player to raid your base or farm
You then need to send message to player to raid your base.