Walter Montego: I agree that Fisher Clock is the way to go.
However, I would prefer if it allows to use a bit of vacation, because it happens sometimes during the year that you cannot play for some days. For example, I do often international business travel, where I am on the road with colleagues for several days, often without internet access except late at night in the hotel. So, I play around 8 to 12 times a day all my moves in all games, for maybe 340 days a year, but there are maybe 5 periods of 3 - 5 days where I cannot play. I prefer an even tighter Fisher Clock than you proposed - for example initial 3 days, 6 to 12 hours bonus per move, max 3 days. That forces both players to move 2 to 4 times a day (I understand that this is not good for everybody), and I never even get near the timeout, except those periods described above, where I lose many games. So I wish there would be a way to have very tight Fisher Clocks with 10 days vacation per year, that would be perfect.