I can do it anywhere, but I do it regularly.
Firstly, sit wherever you're most comfortable. If that's crouching on the lounge, then so be it. Close your eyes and only listen to your breathing. If you're thinking of something, that's ok, but just listen to your breathing. Take slow, deep breaths so you can concentrate on them.
There have been many times where I'll fall asleep while meditating, and that's ok. You'll be surprised when it does work, how fantastic you feel. You seriously feel like you're having an outter body experience.