Yay for Homebirths!
I had a homebirth at 37 1/2 weeks. I had worked all day (out of town, no less) the day before I went into labor at 4am. Some friends had even had a surprise shower for me the night before.
I went into labor much earlier than anticipated (1st baby, really thought I would go later like all of my older sisters). I had actually been on an AIRPLANE less than a week before I went into labor. I was that sure I'd go later. CRAZY, I know!
So, my advice, you never know when it's going to happen. I convinced my husband that "this was the real thing" - so he got up, went running - and we commenced washing 6 loads of laundry and I went to the grocery store to stock up on food (we had gotten back from out of town only to work full time that week after having just moved into a new apartment - yes, we were crazy.).
It all sounds a little nuts, but we were also VERY excited. I was mentally prepared, if not physically, so everything worked out just fine. But I would recommend being physically prepared by 36 weeks. I totally think you should hire someone to clean your house from top to bottom at about 36 weeks. Yes to making meals, and yes to arranging for post-partum support.
I was glad to only have my husband and our midwives present at the birth. They were wonderful, and my husband was my rock. I totally depended on him, and I did not want to be alone to labor - I wanted to be with him and my midwives. I liked the support - I otherwise like I was doing this on my own.
I think my advice would be to be prepared, and also to be VERY honest with yourself about your preferences, and then honor yourself and your baby by making choices that will make you comfortable. Your comfort is really important to helping that labor go smoothly.
I also second the motion to cover the clocks. I just decided to do that to protect my sanity as my labor got a little long, and it really helped.