Wait for it.
If you can't wait,
F5 for prestige!
(Your real F5 button, if any, won't work)
True Idle (v.0) False Idle (v.2)
(This version of 'Pure Idle' has only one 'boost', which is a gain in 'prestige' when hitting the [F5]. Your 'prestige' adds slightly to the rate at which the score increases.)