Starting your float by using a breath control technique can help you relax quicker and deeper while taking a short-cut past mental chatter. Here are two simple tips you can implement in the tank that can help you relax by controlling the breath.
If you want to breath deep without making waves in the tank, then your best bet is breathing long slow deep breaths into the lower belly. Creating a slow and rhythmic breath cycle can be very relaxing. To do this, see to it that your inhale causes the lower abdomen to rise a few inches, then release the the air very slowly letting the abdomen eventually fall back down to neutral. Continue this type of breathing for as long as you’d like, some people like to count backwards from 100 down to 0 while going down one number per breath.
If you alter the breath by exhaling longer than you inhale, the parasympathetic nervous system (the rest & digest system) starts to become more active which can cause a chain reaction that lowers heart rate and relaxes muscles. The 4-7-8 technique is perfect for this and is as simple as it sounds. While counting at your own pace, simply inhale for 4 counts, hold your breath for 7 counts, and exhale through the mouth for 8 counts. Repeat 4 times or until desired level of relaxation has occurred.
Scanning the body from head to toe with your awareness might be the perfect technique for inside the tank. This technique requires both awareness of your bodily sensations and neutrality of mind.
Starting from the top of your head, very slowly scan your awareness from your head through the whole body all the way down to your toes, going through part by part over a few minutes observing neutrally the bodily sensations you feel. If you feel any strong tension points, rest your awareness on those points for a few moments encouraging them to relax.