We have a bin in the kitchen that all loose change goes into. Every couple of months I take it to the bank and cash it in. I deposited $16.58 this time. All those coins add up! This money goes into our savings account and usually is right around $100 each year. Better in the bank than in a drawer, I think.
I purchased two items that had 'Try Me FREE' rebates on them. I made sure to check them out separately so I received two receipts. I filled out the forms as soon as I got home, stamped the envelopes, and put them in the mailbox. In my experience, that is the key to rebates work -- fill out the form and mail it in ASAP.