I grew up with no money. My family was so piss poor that I envied people who bought stuff at J.C. Penny. When I graduated, I ended up with $50K in loans and a job that paid $49K per year. What I am about to tell you won't make you rich, but, and you have to trust me, it will make your life enjoyable in in the nearest future.
Rule #1 -- learn to retire and to milk the tax code. This means you should be putting away into two types of retirement funds: The standard 401K and something Roth (IRA or 401K). Your current situation is awesome, as your 401K contributions will reduce your taxable income and as you're not making too much, you're allowed to contribute to Roth accounts where money will grow tax free. I recommend maxing out your Roth while you still can and starting from 10% into 401K. Increase the contribution to 401K by 1% per year.
Rule #2 -- rainy day fund. At least $5K first year given your income level. Then make sure that you have 6 months of living expanses stashed.
Rule #3 -- remember that your neighbors make you broke. A financially responsible person who makes $50K/year does not buy a $50,000 car. 95% of stuff people buy is nothing but crap for show. Resist the urge to spend money, especially if it is on the the items that do not appreciate.
Rule #4 -- discipline. Put your savings plan on automatic withdrawal. Set a monthly budget: income - bills - retirement - living expenses = savings. Fixing your monthly living expenses (as opposed to savings) will make your savings grow faster. Many people do the opposite by saving only a predetermined amount each month. I say that it is easier to determine who much you'll spend and then trow the rest into savings.
Rule #5 -- buy things that can be fixed. This applies everything starting from shoes to furniture.