It has taken me 14 years to lose the amount in my signature. I lost 190 lbs from 1991 to 1992 only to put 120 back on when I injured my back in 1994. I just started seriously again last April and have taken off 103.
As for tips it's just good old stick to it and keep going. Even if you screw up you have to look at it like it's part of life and keep going. Don’t let anything or anyone get in your way of being healthy. During the past year I have had 3 gains of 8 to 10 lbs each. But I just kept going. I just decided that if I’m going to do this I couldn’t let a little setback get me down. You just have to keep pushing through no matter what.
As for diet I count calories 1800 a day and follow the American Heart Association guidelines. I did not do any exercise until this past month. I was just too heavy and hurt too much. So after I got to a more manageable weight I started going to the YMCA and swimming.