Have one day a week were you sit down and shred your papers for that week. If you have no shredder at home, bring your shredding to work on weekly basis (if it is okay with your workplace). It only takes a minute when you do a little bit (as opposed to a huge box or drawerful that clutters are spa...
If you can afford it, subscribe to a fitness/health oriented magazine like Health, Women's Health, or Runner's World. They serve as a monthly reminder to stay on track, and I always find something new to motivate me to keep going! You can also share magazines with friends or go to your library!
Some grocery store have recycling machines in their lobbies for their patrons. Do your recycling there, and then use that money for your shopping trip. It'll add up!!
If you create a spreadsheet on your computer, you can track your spending from month to month and create charts that could help you better see how your spending habits change over time. This is also a great way to keep track of balances on credit cards if you are working on clearing up credit debt!
If you find yourself called to the vending machine for a snack or soda on most days, try leaving your change at home and packing healthy alternatives instead! This might also be helpful for folks who are wanting to drink more water instead of soda - just grab a reusable water bottle and go!