Actually, I usually "do it in my bedroom" sitting up on my bed. lol.

Depends on if I'm too tired or not. If I prop myself up, I usu. don't have a problem. (If I'm sleepy, however, it can be a little tricky and I may fall asleep - esp. if I lie down. That's a big no-no when I'm tired.)
Otherwise I may meditate in the living room sitting up straight on the sofa or a chair. Maybe even sitting on the floor with my back against something. (Or a quiet place outside if the weather is ok.)
There's nothing really in particular that I do, per se, but to prepare myself I usually just take time to quiet my mind and concentrate on my breathing. It's hard to fall into a meditative state if my mind is racing and blabbing on and on. (Which on some days is quite difficult - I just want to tell my mind to shut up, already!

lol)
Focusing on my breathing and letting my mind go empty has been a big help to me. Some days it's going to be hard, but practicing this in everday life has helped a lot, too. Once I notice that my mind chatter is going at full speed, I just take a moment - focus again on my breathing - and let my mind quiet down. This is why CD's and guided meditation can be helpful because it gives your mind something to focus on rather than its own chatter.
The more you mind is quiet during your everyday moments, the easier it is to get the answers and guidance you are seeking. Your channel to the Source is clear and it's easier to hear what's being said to you.
But in any case, it's all about finding what works for you. It will take some time. It will probably change over time.
Some days you'll have profound insights, other days you'll feel like nothing happened. But just let go and expect nothing. Everything will come in its due time. It is quite an interesting journey!
In no way am I some master meditator (lol) but this is just a glimpse into some things I've tried over the years that have come to work for me!
I hope this helps! Lemme know if there's anything else I can do!
Keep me updated, K?
Love & Hugs,
Kenge