Don't forget that between now and August 1st My Habit, an Amazon Daily deal site has a coupon code for $25 off any purchase. Use code SUMMER25. Even better this site offers free shipping which could mean some completely free deals.
Here is the catch...new sales come online everyday at 11am CST. To score a free deal you have to be online and waiting to act as soon as these deals are available. The items priced at or below $25 are gone within minutes. So be watching your clock and maybe plan a early lunch or coffee break from work so you can be ready to grab this deal.