Gym, Gym, Gym.
I have always tried the working out at home thing, something always comes up, the phone rings, kids need attention, dinner needs to be made, cleaning needs to be done.... something.
Many gyms have specials this time of year. I just recently joined planet fitness and I love going there because 95% of their members are people who have not been a member to a gym before. At my planet fitness location they are open 24 hrs a day M- Th and 7-9 on F, S, S. I love going there because they stress no lurking (grunting, dropping weights, ect). Pretty much, no showing off. They just want to promote overall health and fitness. Everything in there is easy to use (and fun!) They even have free personal and group training (but in small groups). And a plus for planet fitness if you get the black card membership which is 19.99/mo you also get free guest access (which means you can bring people with you if you know of someone who wants to work out with you.) plus half price sports drinks, free use of massage chairs and free tanning (once you get that A+ body, that could really be an incentive.... at least it is for me.)
You'd think i'm promoting Planet fitness or work for them, but I really dont, i just love them because how affordable they are. Their memberships range from $10 - $20 a month.