Resizing pictures....HELP!!

I'm having a hard time finding a website to resize pictures and then upload them to blogger EASILY!!  I don't want to have to go thru a million steps to get them back on blogger.  Please help me if you have figured out an easy way.  I tried Flickr and it was easy but once I got them in a post they were teeny tiny and it wouldn't let me make them bigger.  I tried tinypic as well but didn't like it at all!!  I'm gonna keep looking on google for help and see how far that gets me!