Several things that work for me:
1. Get grounded. Try to get outside barefoot in contact with the dirt every day possible. Begin a garden. Don't wear headphones/music or sunglasses out there. Try to absorb nature through all five senses at once. When you become grounded you are becoming more attuned mentally to the whole world.
2. Have a pyramid above you when you sleep. Mom and grandma and I always kept a plain small cardboard pyramid on a shelf directly above where they slept. Being under a pyramid when you sleep is supposed to boost the psychic energies.
3. Make a dowsing rod and explore. Dowsing rods have been used for a long time to seek out things. Metal coat hangers seem to work best, but people just used sticks a long time ago. You will be amazed when you are just walking along and the tip dives to the ground unexpectedly.
4. I usually eat a snack before bed and wash down a 500mg. niacin pill right before i go to sleep. This makes my dreams extermely vivid and long lasting. It works for me, anyway.
I would advise you to not use any Ouija boards or attempt astral projection. These may seem to do interesting things at first, but leave you vulnerable to sinister or demonic entities out there.