Do you like the effect of tilt and shift lenses but not the price tag? I read recently about 'free-lensing', a technique where you remove the lens from your camera, and manually focus and angle it until you get the effect you want before clicking the shutter. Please be aware that if you do this outside you risk getting dust etc inside your camera, so be prepared! It's also easier if you use a tripod so that you have one hand free to hold the lens and the other can use the focussing ring on it. It can be tricky but the effects you can achieve are so different that it's well worth the effort.
Found this lovely portrait on Flickr using the technique
And here's a couple of quick shots I tried myself:
... and a still-life.