gaining weight

Hi, my name is mike. i have struggled badly with gaining weight. i use to workout with basic exercise and weight lifting. I got sick back in 2010. thats when i stopped working out. Im just getting back into it. Im tall and skinny. I only eat healthy now, mostly all homeade foods. if anybody else has this problem, tell me what you do or help me with some advice. i would really appreciate it. Thanks! I also have a support group started on facebook called fit for life