Often the problem is not knowing what to do but having the confidence to actually do it.
Now let's think that through for a minute...
Confidence literally means 'with faith.'
So if you're struggling to follow through on something God has been nudging you to do, what you really need is an infusion of faith.
And you get such an infusion not from something you eat or drink or an injection or anything like that...
... no, faith comes by hearing God's Word (Rom.10:17).
This is why not only reading the Bible but listening to it is so powerful.
There just seems to be a special connection between the ear and the heart.
Take care what you listen to. And especially make the effort to hear God's Word.