Mac Troubles

OK....I have recently purchased a Mac and it has been glorious. Dave and I watch movies in bed a lot and editing photos has become so much easier...I love it but when it comes to uploading pictures to my blog it's like pulling teeth. It never wants to cooperate, but once in a blue moon will gloriously work. It also barely works when we try to upload pictures on Ksl and other sites like that. Does anyone have any tips or any ideas why this happens.....I think I will call the Mac helpers tomorrow....