“…for then thou shalt make thy way prosperous, and then thou shalt have good success.”  
Joshua 1:8

Productivity is inherent with you:
“Ye have not chosen me, but I have chosen you, and ordained you, that ye should go and bring forth fruit, and that your fruit should remain: that whatsoever ye shall ask of the Father in my name, he may give it you.”  John 15:16
He wants your fruits to last, this is akin to the main verse, he wants you to have good success- success that causes joy, multiplies and impacts generations.
It’s interesting that he points out in John 15:16 that fruitfulness is a catalyst to receiving from our Father. God anticipates your fruitfulness and productiveness, but to produce fruits, there have to be seeds planted to cause the fruits to come forth. The Bible says:
“…The seed is the word of God.”  Luke 8:11
When you speak abundance, that’s a seed and the results would come forth in thirty, sixty or a hundred folds. It will be interesting to expect results or produce fruits without starting seeds, the best part about this information is, your tongue is yours and there is no limitation to the size and quality of seeds you can sow when you talk:
“Our tongues are small too, and yet they brag about big things. It takes only a spark to start a forest fire!”  James 3:5, CEV