Walgreen's Register Rewards

I have $3.00 in register rewards expiring in a few days.  I have a decision to make.  Do I use it today with the ending sale?  Or do I hold onto it and use it next week?  I try my best to use my rewards smartly, but that does not always work out.  By smartly I mean use my rewards on an item that produces another reward.  This could be difficult since there are so many rules with the register rewards.  If I want it to produce another one, I can't use it on the same item that I got the RR from.  I would suggest going to Walgreens website and reading more about Register Rewards if you are not familiar with them.
Looking at the ad for tomorrow I know what I am going to use the RR on.  I will be using a coupon and my RR.  Because of Walgreen's couponing policy you cannot have more items than coupons.  You need to have either the equal amount of coupons and items or more items than coupons.  Plan your shopping trips wisely.