Sip, always have a liquid in eyesight and reach, sip, drink a variety of liquids, sip, ice chips or sugar-free ice pops, sip.
If you're thirsty, you're already dehydrated.
Some people go to the extreme and set alarms to remind them to drink. I don't go to that extent. Some people have a favorite glass, bottle, mug, etc that encourages them to drink more.
If your urine is really dark, you should see a doctor because there might be something else going on. Sometimes weight loss and a drastic reduction in calories can be dangerous for people with kidney disease.