Help Help Help

Hi again! I am struggling with posting pictures on my blog. I want to post bigger pictures so the detail can be seen better. I have tried using photobucket and resizing my pictures. It makes them bigger but when I bring them into my blog it cuts half of the picture off. Can anyone help me out here? I am new to all the blogging and not sure what all I can and can't do. Thanks for any help that anyone can give me!!! I so much appreciate it. What does everyone else do with their blogs? How do you import pics and what programs if any do you use?