And that brings me to lines... lines should be straight... unless you intentionally make them slanted.
You can see the lines in the brick wall aren't quite straight. If I didn't point that out you might not notice it but it's there and they should be straight.
Thankfully there are some simple ways to fix this in post processing.
Picasa is a free editor that you can download and it has a straightening tool. You just slide the slider until you see straight lines. (That's my tip for those of you who don't care to spend loads of money on photo editing stuff. You're welcome!)
I usually use Photoshop Elements and just take care of all my editing in this program. It's still simple to straighten out some slanting lines.
I select the crop tool and get my crop square up on my photo. Then I grab one of the corners and tilt the crop box until it is showing straight lines.
After I have my crop lined up with lines I finish setting the crop area...
And ta-da! Straight lines!
Just a simple way to take your pics up a notch. :)
Do you have a photography question? If you do I would love to try and help you out. Just leave a comment.