John 15:5 KJV — I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing.
The burden of provision of grapes is on the Vine, not the branch.
Your job is to simply abide, to stay connected, and allow the life of the Vine to flow through you.
The key to being fruitful is simply in abiding.
Abiding is grossly underrated.