Problems posting pics

I was trying to post some pics yesterday, but had problems because of the file size, it said there was a 78KB limit size and all mine are about 200 or so KB.

I'm pretty handy with a wrench but when it comes to computers, well thats another story Was just wondering how I could make the picture files small enough to post on here, would really like to post some of my Sprint.

Thanks so much in advance for any help