Try to eat fresh food which contain more water content in it. That will make you full and healthy. Try fresh fruits. leafy greens, dark chocolates, oat clusters, etc.

Protein powder that can be made into shakes comes to mind.  If needed - I still do that. 

there are also a lot protein bars, jerky (the low sugar version), or shelf-save meat sticks.  Meat-based epic bars - It is easy to take with you . Tuna - packed in individual pouches - is easy on the  go meal-snack..

when I travel - most hotel rooms have fridges or you an ask for one.. I go to a store and buy cold cuts, some veggies. 

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I am, too!  Also I am a compulsive eater.  Low carb has been the only way I have ever been able to lose weight.  I am getting sleeved in August, and I worry about regain if I can't stick with it.  Just gotta do what I know works.  

18 days post op that is fine!  Let's you get all your drinking in that way, too. 

I actually do intermittent fasting (IF).  I fast 12 hours (from 12a - 12p).  I eat my first meal at or after noon, and don't eat after 12.  Though, it's really more like 16-18 hours since I don't eat past six.  I eat 3 small meals during that time.

I didn't do this close to post-op, of course.  For me, IF helps regulate my hunger much better than more frequent meals.  I also eat a more moderate protein/higher fat diet (low carb) which it works well with.  Paired with Harvey/teenystomach, it's helped me stay on track and reduce cravings a lot.

I had been making some changes for several weeks but I did think about that "last meal" because I will be on liquids for a long time post-op.  I decided on spaghetti because it is something I may never eat again.