My husband loves meditating while taking a hot bath with music playing when he has been exceptionally "stressed" from work and such.
But honestly, you don't have to "relax" to meditate. Meditation is about quieting your mind and either focusing on one single thing or nothing. Repetitive motion provokes meditation, such as knitting, sweeping, and even jogging. Don't you ever noticed how zoned out the speed walkers, joggers, and bikers are on the tracks? They're in a meditative/trance state. You probably meditate once a week if not every day without ever realizing it.
We purposely meditate and create a focus for ourselves to strengthen our minds. Try a mantra like OM. You need to read how to actually do it correctly and how to breathe right. It isn't as simplistic as it seems. The sound is supposed to vibrate through different parts of your body as you say it and you need to breathe with your diaphragm.