I need a best man speech improved. The flow, grammar etc.

I've written my best mans speech for a wedding I am attending in little over a week. I am looking for someone to go over the speech and correct all grammar mistakes etc. The speech has been made up of personal stories and some jokes etc that I got from the net. I don't think it flows very well in certain areas, so I need this improved too.

Any suggestions or help with improving the general content would also be appreciated!