Hold it as long as you can.
( ( ( Hold it ) ( ( as long ) ( as ( you can ) ) ) ) . )
(ROOT (S (VP (VB Hold) (NP (PRP it)) (ADVP (ADVP (RB as) (RB long)) (SBAR (IN as) (S (NP (PRP you)) (VP (MD can)))))) (. .)))
Just let go.
( Just ( ( let go ) . ) )
(ROOT (S (ADVP (RB Just)) (VP (VB let) (VP (VB go))) (. .)))