First off, I would just like to extend a well deserved congratulations to Lt. Douglass. As Major Frumby previously posted, it is good to see a few leathernecks on the board following the Marine Corps path to their wings.
Lt. Douglass, I won't be heading off to TBS until next summer so please keep us posted on your progress and impressions while there. It will definetly be appreciated. As for the other questions, I'll humbly submit a few of my thoughts for those about to attend OCS.
DC, as far as a typical day at OCS goes, well, there really isn't a typical one but I will try to generalize as much as possible. There will always be PT six days a week of some form or another. After the first couple of weeks you will spend at least a night or two in the field every week. When in the field your PT usually consists of the hump out there interspersed with "admin moves." These are basically small sprint humps to different areas. In between your PT during a day you will be receiving classes, exercising your leadership billets, doing practical applications, and many other various motivational activities like Pugil Sticks and night land nav.
Some random comments: You will always be tired, sore, and hungry. The level of these will depend on your conditioning, but OCS PT is designed to be taxing no matter what shape you are in. Just remember that this is part of the process of seeing your command presence under duress. Give your body what it needs, not what it wants. You will learn the difference.
There will always be more details to accomplish than it seems time to get them done. You must prioritize! If you hold a cammand billet, take care of those particular duties first. Make sure you keep a solid and reliable flow of communication amongst your candidate staff. If you have a good staff it will of course be easier. If you don't, then make sure you look at the situation as an extra challenge and opportunity to show your skills. Don't be a finger pointer! With acedemics, learn as much as you can before you go. Just like the extra PT, it will pay off in spades when you are there. Prioritize your studying as well. When you are up out of the rack at night doing those duties the Sergeant Instructors want "magically" done by reville', study for the next days test before doing uniform knick knacks. Or better yet, get some other candidates and quiz each other while you do your uniform maintenance. Better to weather an ass chewing for unsightly boots than to fail a graded event.
Other specifics: NEVER EVER COMPROMISE YOUR INTEGRITY! Over anything! The reasons for this are countless. "Nothing dictates a mans actions during war more than his character." I can't remember who said that but there are many great books available that are invaluable when it comes to understanding the Marine Corps business of leadership. It is what separates us from the other services and militaries of the entire world. Practical application is the best means of devolping your skills, but a foundation of knowledge will hasten the transformation. Check the Commandants reading list for good titles. Some of my favorites on their were: Battle Leadership, The Marine Corps Officer's guide, God's Children, and Black Hawk Down. Some are reference and some are fiction, but they all have tidbits of leadership, especially at the small unit level.
I hope this has helped. If you have any other specific questions feel free to ask.
P.S. SULE stands for Small Unit Leadership Evaluation. At the last level you will be given a combat order in the field of which you must scribble down five paragraphs of information in about sixty seconds (you will learn to abbreviate). You will take this information and plan a squad assault based on the information given. You lead the patrol out through the various nav points while changing the formation as new intel becomes available. Once you see the objective, put the squad in a skirmish line and assault. Open up unmercifully at least 10-15 yards past the objective, then consolidate and debrief. It takes practice, but for a Ground Pounder like you O-Man, I'm sure you would eat it up!
Semper Fidelis