My local Staples has a few penny deals that I won't be missing coming up starting with Sunday 7/7 ad and I hope yours does too. Your ad may vary from mine, so be sure to visit weeklyad.staples.com to check your local store's upcoming ad. There may or may not be a minimum purchase requirement. Past years have shown some areas to have a required amount to spend (usually $5), while others haven't. YMMV.
Penny deals with $5 minimum purchase:
Staples cap erasers -- limit 2
Staples note cards -- limit 2
Bic Round Stic pens -- limit 2
Penny after rebate:
Staples copy paper -- limit 2 (price is $6.99 at purchase with $6.98 in Rewards coming back to you later)
Avery Insertable dividers (5 tabs) - limit 2
There are also lots of $1-$2 deals, but I am going to hold out because I know I can get some items much cheaper (particularly glue sticks).