Please do not use this photography tip (except on halloween)
WARNING: not recommended for children under 13
http://photojojo.com/content/diy/iphone-as-softbox/
SLRs can seem daunting with all the isos, white balances, apertures, shutter speeds... It is easy to just fall back to the little green "auto" setting on the dial, but you end up wasting your camera's potential (and your dollars, frankly). If you are a newbie to higher end cameras, check out this informative primer on DSLRs at Lifehacker.com.
Shooting with a tripod, but still getting blurry shots? Want to take exposures longer than the maxium exposure setting on your camera? Easy (and cheap).
With a wired handsfree headset made for cell phones you can make your own shutter trigger. I followed this simple instructable using stuff I had horded in a box under my bed.
At a public computer and the only app to edit photos is Paint? Don't fret, just use one of the many free online photo editing apps like Picnik.com, fotoflexer.com, or Adobe's PhotoShop Express. You have to register for PhotoShop Express, but it is a good choice for those familiar with the photoshop layout.
I heard about Scott Bourne's photography critique site scottcritiques.com while listening to the MacBreak Weekly podcast. Bourne is a professional photographer who is offering really good advice on improving your photography all for free. Check it out.