The sooner the better
Definition 1 of 1
Pro Tip 1/3Urgency Implication
Expresses that taking action quickly is beneficial and delays could lead to problems or missed opportunities. 
If you want the best tickets, the sooner the better.
Pro Tip 2/3Suggestive Encouragement
Used to advise someone politely that it's in their interest to act promptly, often without giving direct orders. 
Should I apply for the job now? Yes, the sooner the better.
Pro Tip 3/3Conversation Softener
While suggesting speed, it can soften a request by making it less demanding and more friendly. 
Could you please send the report soon? The sooner the better.