2. Look at porn, but don't jerk off
isn't that a form of torture they use during wars?
EDIT:
Hopefully, if you do stop jerking off for a period of time, you can actually remember a wet dream, when you do have one. You can stop jerking off for a month or two, have a wet dream in that time, but not remember it when you wake up. I haven't remembered a wet dream in years. I only seem to remember any kind of dream about once every 3 months.
If you want to remember your dreams, I have a sure-fire way. Buy a book and keep a "Dream Log". Every time you have a dream, as soon as you wake up, even if it's like 3am, get your book out and write down as much as you can remember about the dream. Then go back to bed. If you wake up after having a dream and go right back to sleep, when you wake up again you won't remember much about the dream at all.
This really works. I tried it once before for about two weeks, then I got bored with it, but the more I did this, the more vivid, lengthy and fleshed out my dreams became. Before any of this, I would only remember a dream like once every month. =P
Maybe if you combined the rules above with a dream log, you'll get results.