4.) Collect money due you. We're always so focused on what we owe, it can be easy to forget to do the paperwork to collect money we are due. If you are enrolled in a flexible spending account through your employer, make sure you collect all of the tax-free money you squirreled away during the year to pay for medical expenses.
5.) Establish a system. Now that you've got your paperwork organized, set up a system that works for you. Go through bills immediately as they come in the door. Establish one place (not five) where the bills are immediately stored so you see them to remind you to pay them. If you're not comfortable tossing bill statements as quickly as recommended above, try this approach from Real Simple: Buy an accordion folder that includes a slot for every month and pop in the bills and credit card statements for each month once you've paid them, so they'll be in once place come tax time.
How do you consistently (that's the key) keep your finances in order throughout the year?