Hi Kcameron1, welcome :) You must be very excited/nervous...not long now.
My number one advice would be listen to your team - your surgeon and dietician. The rules post op are there for your benefit and safety, especially important to stick only to your particular phases (so if puree, stick with puree until advised). There are many different ways and opinions from surgeon to surgeon but stick with what yours advises.
Try to make sure you have time enough to rest and treat yourself well after surgery, it's major surgery and it will take a month or two (some people less, some people alot more) to fully bounce back, treat yourself gently in this timeframe. Having said that, it's really good to start slow walking when you can after surgery, it really helped me work through any discomfort/gas I had (although I was really lucky and didn't have much)
Also some people on here find it really helpful to have soups made up for your liquid and puree phases post op.
I'm sure there are many, many tips and tricks and advise for straight after post op but you're probably better off just having a read around the forum and gaining tips where you can. If you are part of the October group I'm sure they're all sharing lots of stuff about now in the lead up to ops.
Best of luck with your surgery, see you round the forum.