If asked how they became rich, many wealthy people will respond that they lived cheaply in the beginning to grow their savings so they had more to invest. Being frugal just requires a little more thought, such as shopping with a list to only buy what you need, or being sure to turn off all electrical items before going to bed or leaving home.
You could also cook from scratch more and vow to eat out less. Shopping locally and planning to run errands within close proximity of others can save gas money, and walking to where you need to go can give you a little exercise as well.
Lastly, consider shopping for clothes and furniture at thrift shops and consignment stores, or find deals online at sites such as e-bay, overstock and half-dot-com.