It cannot be emphasized enough--a positive attitude about budgeting is essential to your success. If you think of budgeting in negative terms (such as a financial diet, financial handcuffs, restrictive, penny-pinching, a sacrifice, etc.), you are sure to fail, unless you are a martyr or a masochist who finds some strange reward in a punishing experience. For purposes of this article, I will assume that you are neither.
A positive attitude means you think of a budget as a means to an end--a way to achieve your dreams and goals--and that postponing the instant gratification of spending all the money you earn is worth the rewards you will earn in the end.
Budget Buster #2 - Lack of Motivation
What is your motivation for budgeting? Are you trying to appease a nagging spouse? Following the terms of a debt repayment plan with a consumer credit counseling agency? Complying with an agreement made in bankruptcy court? These are not bad motivations, but they are external pressures and will probably not be easy to maintain over time. The best motivations are internally generated: do you honestly believe that budgeting can help you meet your goals?
If you need a little help in the motivation department, see "Top 12 Reasons For a Family Budget." A quick re-read of these will surely inspire and ignite a motivational spark or two!
Budget Buster # 3 - Unrealistic Expectations
What do you expect to gain from instituting and following a budget? Do you think that setting up a budget will reveal large caches of hidden cash or that the budget fairy will sprinkle fairy dust over your budget and magically transform your spending habits after a month or two of tracking expenses?
The reality is that budgeting is an endurance event -- those who stick with it, through thick and thin, will come out ahead financially. Do not expect miracles. What you WILL see if you stick with it is steady, measurable progress towards the goals that really matter to you.