Hi Beekyleevsg, best wishes for your surgery. I have just come home from hospital yesterday. Surgery on Wednesday, home Saturday. The post op days were not too bad apart from reflux and difficulty getting my meds down - had to break them up into little pieces and it took an ages to get them down with the slow sips. My dietician recommended Bodie'z Protein powders which comes in flavourless, berry and orange. The flavoured I am putting in 600 ml cold water and sipping throughout the day- gives you 30g protein. Flavour is quite ok- not too sweet. I got a sample pack of the 3 different sachets for $20 to try. Cheaper to buy in bigger containers.
A bit early for me to give tips re post surgery - still learning. Not doing too much so far but hope to improve over the next week or so. I have down loaded Sally Johnston's Your complete guide to Nutrition for weight loss surgery. It has great recipes for each stage of the recovery process. Around $20 from iTunes.
Good luck for tomorrow!