Recently I found a good program that makes it a lot simpler to save, find, and analyse your replays in SC2.
Some features:
- It saves a reply automatically in a format you want I setup so that it saves the replays in game type (folder, e.g. ladder or private games) then it saves the the format of the game (e.g. 1v1, 2v2, in a subfolder) and finally in the last folder which specifies the matchup (e.g. PvT, TvT). The filename then specifies the date of the game, name of the players and the map that was on. I preferred using this style because it makes it simple to look up specific matchups—the program can easily filter out these games for you making it a bit unnecessary, but it cannot directly start a reply if an instance of SC2 is already running; thus when you already are in SC2 it’s easier to find the specific matchup.
- Replay analyzer You can simulate when units are being produced, making it simple to see if you’re constantly producing units. However a reply doesn’t register when a unit is killed, so you cannot see how many units you have. You can also see which hotkeys you pressed, the APM in the match, the length of the game (in real time, not Blizzard time). There are a lot of other information you can get from this feature, but these are the main ones.
- Multi-replay analysis Analyzes win ratio (both total and for all matchups), average game time, games per day, APM improvement over time, games per day, when you play the games, etc. The list is long and it’s just a bunch of statistics; but statistics are fun to watch
- Advanced search function There’s an advanced search function which lets you specify name of the player, win/loss condition, date, matchup, filename, chat message, format, game length, even build order. You can search for anything, at least it feels that way.
I’ve been using this program for about a month now, and I really like it. So to anyone that want to improve their SC2 I strongly recommend using this program as it makes analysis of your games soooo much easier. The auto save replay function is probably the best feature of the whole program in my opinion, because that’s probably the main reason people doesn’t save the replays.
You can find the software here: http://sites.google.com/site/sc2gears/
Oh I forgot to mention, there’s an APM alarm that you can turn on, this makes it warn when you have a low APM in the game 
It can be quite annoying but I have it on to remind me of doing my macro 
One thing I noticed this May (alhough it’s not ended yet) was that I had a high win ratio playing PvP (75%, no four gates) and PvT (83%), but only 28% win ration playing PvZ. This makes it very easy to see in which area I need to improve on
Another note, I’m thinking of going to DreamHack Summer this year, just to see all the StarCraft 2 matches and to say hello to Day[9] 
Gogogo, play some SC2 games I will play some games after I’ve finished my studies for today
Senth