not sure about not making more than one move in a day but i agree with the rest :) solid advice to those who don't already do this!
Some tips - Dear friends

Hughesed i am a 1600 rated player. my personal experience is when I was playing two 1900 + players I was making a move in 2 days thinking for over 2 hours for a move. I scored 2.5 in 4 matches.
One more advice is when you are confused about what to play in a particular game. Just leave it for the other day. With fresh mind next day sometimes you can get some brilliant ideas. Just try it my friend.
I have noticed a lot of members in our team matches are playing their match games very quickly. You may win, and you may lose as a reuslt of hurried play, but....you will not improve your game.
Remember, when you play the opening, you look up variations and play them over, see what types of positions arise and choose ones that you like the looks of. this way you learn openings.
When you play the middle game, try to consider at least 3 candidate moves, and analyze them out to the best of your ability. If you're not happy, look harder, or for more candidate moves. I'll tell you right now a lot of good games are ruined because you play impulsive and reactionary moves as a result of playing quickly.
when you get to the endgame, do some research, find the plans and strategies that go with each type of ending so you will learn endings! You may beed to invest in a few specialized books, but this will improve your chess.
If you insist on playing quickly, you lose opportunites to improve your play. The whole goal of my course is to improve your play, at least up to master level.
You should not move more than one time in a day in any game. If you wish to play quick chess, I suggest you try Live blitz games and play slow in the online games.