Can you suggest a REALISTIC weight loss program?

I'd like to lose 30 lbs in 6 months or less. I did it about 5 years ago using the Atkins but it was also because I wasnt eating from depression. IIve gained it back since. Much of it from drinking beer, which I do MUCH less of now! I didn't mind not eating when I was depressed but really dont want to go that way now since its unhealthy. I can stick to a program, I just need something to stick to. I dont believe the Atkins diet is right for me at this point of my life. I also dont have a huge amount of free time for exercising but could spend 15 - 30 minutes a day doing something like that. Im a 6'4" male. Weigh 225 lbs, medium build and am 35 yrs old... Thanks ahead!