It's fine. that's just as valid as any other position.
q and a
The most common is lying on the back. Other favorites are lying face down, standing up (such as in the shower), or kneeling. For statistics on this topic, see SURVEY #2 (from March/April '97) (question #16).
We recommend a water-based personal lubricant, such as K-Y Jelly, which can be found in the drugstore as well as some supermarkets (in the feminine protection section).
It's tough; it takes a lot of will power. It can be done, especially if you're driven by very strong religious feelings. However, JackinWorld's position is that it's not worth it. We think you should enjoy the harmless pleasures your body can provide.
It is, although many, many people think they're addicted when they're really just doing what comes naturally. For more on this topic, read the article Is masturbation addictive?.
It depends on a lot of factors, the most important being age. For an 18-year-old male, a rough average is once a day or so. This is slightly higher for younger teenagers – maybe 10 or 12 times a week, and slightly lower for older people. You might be surprised by how often adult men masturbate – even happily married men.
For more on masturbation frequency, see JackinWorld SURVEY #3 (from October '97) and the PUBERTY SURVEY (from July '98).