Even though its early, your baby is forming its amniotic sac and keeping it fresh which requires A LOT of water. And even though you don't feel it, your body is literally exercising every minute of the day as your baby grows. Keep sipping on water throughout the day. It's not only good for the baby and you, ice cold water is supposed to help with nausea and nutrient absorption. But a pregnant women needs to drink more than 80 fluid ounces of water a day. One source (forgot who this was a year ago) said over 100. What to Expect says 12-13 eight ounce glasses a day which is 96-104. Just spread it out/keep sipping all day. If you're feeling the thirst, my gyn says you are not getting enough water and to drink even more. Every pregnancy is different so different pregnancies need more or less water.
No other tips really sorry lol or try eating water rich foods like watermelon but straight water is the best