A proper match report (that's a match report that's given a little bit of love and attention

) HAS to be two-sided - as any decent, honest news reporting should be. And at the end of the day you'll draw in a far bigger readership, on a regular basis, doing that.
Regarding your actual methods, whether it be "sheet of paper split down middle.. use player numbers and make my own code for anything that happens", or a recording device, you do what is easiest for you. As you'll already know, it's very important to get your facts correct and in order, so concentrate on the easy stuff first; names of goalscorers, times of goals, yellow and red cards etc, etc. Getting a quick quote at the end of a match from both managers or/and some opposing players is always popular - it doesn't have to be in-depth, just some one-liners. If you're new to it all then a small recording device is the best way, as you definitely don't want to misquote anyone or take their statements out of context. And unless you're writing stuff down during a game, then once again, a recording device (the wee handheld digital recorders are brilliant) is ideal. Look upon it as you commentating on the game and then replaying it all, back to yourself.
As I mentioned further up the thread, I photograph and do match reports for field hockey up here in Scotland for my own website and the many clubs I photograph. I've played the game myself for the last 40 years, so it's all become second nature and, to be honest, I rarely have to note anything down or speak into a recorder as I can memorise most of it during any match. However, it's not the greatest practice and not to be advised!

. I never do any of that for other sports. Recently I photographed the SPL Partick Thistle V Aberdeen match and decided to submit my own report on the match as well, to some north of Scotland newspapers. I know the brother of Aberdeen manager Derek McInnes, so got a couple of quotes from him on Aberdeen's 2-0 win, courtesy of my digital recorder. Worked a treat! Two "local" newspapers up north took my report. They didn't credit me...but, they paid me. Job done!
Best of luck.