No place like home - There's.
There's many a slip 'twixt cup and lip.
The grass is always greener on the other side of the fence Link to proverb.
Don't try to walk before you can crawl.
Genius is an infinite capacity for taking pains Link to proverb.
Don't let the cat out of the bag Link to proverb.
Don't throw good money after bad Link to proverb.