Real diver never stop learning and growing. Here some tips to help divers hone their skills, perform better and having more fun underwater:
1. Learn to make good go/no-go decisions. If you don’t feel comfortable, don’t go. If you don’t want to go deep, don’t.

2. Keep a log. It’s an invaluable tool whether you have 5 or 500 dives. It’s not only a living record of your experiences; it’s also a place to keep track of your weighting, gas consumption and gear.
3. From air-consumption rates to treading lightly on the environment to being able to relax while diving, it all comes down to buoyancy, and that means proper weighting.
4. Slow down. Just about everyone goes too fast underwater. To most aquatic life, divers are big scary goofballs who make a ton of racket.
5. Plan your dive; don’t just rely on your dive-master, or on your computer, which is powered by a battery that has limited life.

6. To maximize your confidence and comfort underwater, practice swimming and yoga for a few months leading up to your dive course. Yoga helps you learn to focus on your breathing, one of the most important elements of scuba diving. Swimming helps you maintain control of your body underwater.
7. Planning a dive vacation? Make sure to learn about the risks of flying and diving before you hit the runway.
8. Avoid diving with an underwater camera for your first few dives, even if the school allows it. Beginning divers tend to get distracted with playing with the buttons, often causing them to ascend without realizing!

SO DON’T PANIC. ENJOY YOUR DIVE TRIP.
(Source: https://www.sportdiver.com/learn-to-dive/article/10-top-dive-training-tips)
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