I got some ideas for you but i'm not a pro.. I'd say eating late in the day will help so your body has less time to burn it off. (edit) Big Breakfast and up the portions you take in, supplements will help.

If you weight train.. high weight & low reps. Again I am not a professional trainer but from experience if you can do more than 6 reps you're lifting too light. Do not do as much cardio ESPECIALLY on the days that weight train.. matter of fact don't do cardio at all on those days. I'm sure more people will chime in..