It is quite annoying to see pictures that are too dark to see what's in them. Sideways pictures are also annoying (among other photographic conditions). Fixing the pictures before uploading makes your work look more professional.
Step 1: Download The GIMP
Step 2: Fix the picture
From the drop-down menus, select Layer->Colors->Levels.
In the middle of the Levels window, you'll find the gamma adjustment field with the adjustment slider just above it. The middle sliding pointer is the gamma. Increase the gamma to lighten up the dark parts of the picture without affecting the lighter ones too much.
Step 4: Rotating images
Step 5: ...turn, turn, turn...
Go to the Image->Transform menu and select the appropriate rotation you need.
Save the file (to original or Save As a new name).
Step 6: That's all it takes.
The Minnesota state flower in it's proper orientation.