Without this tip, none of the others matter.  If you're not tracking your spending in detail, you simply do not know where your money is going.  Without this vital information, it's hard to spot ways to save.  Fortunately, there are many online tools that make it simple to see where your money is going.  Choose one that suits your needs.  These tools will pull information from your bank, and help you categorize your spending.  This is made easier if you do most of your spending on a debit or credit card.  If you're all cash, you will need to carry around a notebook to record your transactions.  Whatever it takes, don't skip this step.
 

Now that you have a record of where all for your money is going, it's time to start looking for easy ways to save.  Subscriptions are a great place to start, since they take your money every month or so until you cancel.  Try adding up the yearly cost of a subscription to see what you can save.  Of course, you probably subscribe to these services because you enjoy them, so you don't want to cancel them all.  Instead, consider cutting back.  I recently realized that my three DVDs at a time Netflix subscription was a waste of money for as many movies as I watch, so I cut it down to one at a time, saving me money every month.  Similarly, I find that having cable TV is not that important to me, so I save that bill every month.  Your priorities may be different, but take a look at what you're spending on and decide if it's really worth it to you.
 

Fees eat at your money for no good reason.  If your checking account is charging you fees, switch.  If your broker is charging high commissions, find a discount broker.  If you don't want to switch financial organizations, call your current provider up on the phone, and say that you're thinking of switching because of the fees.  Chances are, they will waive them in order to keep you as a customer.
 

Speaking of making phone calls, it's time to start dialing.  So many things in life are negotiable, so it certainly pays to try.  When renewing your lease, see if you can shave a bit off your rent.  Threaten to move away as leverage.  If you've been a good tenant, chances are they will want to keep you.  I've been able to save money on my internet service by calling up and mentioning competitor offers.  This can work for insurance, subscriptions, housing, jobs, and more.  You never know what you can get until you try. 
 

What do I mean by major lifestyle change?  If you're a two car family, consider dropping one car.  You might be surprised how well you can adapt, and the savings will be incredible.  If you only own one car, you might trying going car free.  Other major lifestyle changes include downsizing your housing, or moving to a lower cost of living area.  These moves won't be for everyone, but they are certainly ways to save some big money.
 

So, you have some tips.  Now, get started.  Set up a spending tracking plan, and start trimming the fat today!