Avail yourself of
Definition 1 of 1
Pro Tip 1/3Opportunity Awareness
Understand that 'avail yourself of' implies you know about the resource or opportunity and decide to use it. 
I availed myself of the free tutoring offered.
Pro Tip 2/3Initiative Required
'Avail yourself of' often suggests that you must take the first step to use the resource. 
He availed himself of the career counseling program.
Pro Tip 3/3Formal Expression
The phrase is formal; it's more common in written English or formal speech than in everyday conversation. 
Avail yourself of the early-bird discount.