(6) To a better negotiation: you cannot negotiate until you have sold. Ensure you sell first; they must broadly want what you have to offer. Then trade, thinking as creatively as possible about what you can give in return for what you can get. Talk openly about the need to reach an agreement which works well for both parties.
(7) To a better mood, quickly: go bash a newspaper against the back of a chair; you will feel better. Longer term: get more sleep, clean up the diet, exercise hard regularly and learn a relaxation methodology.
(8) To getting the job where you miss a key criterion: the ad says an MBA is needed but you don't have an MBA. That's not necessarily the end of it. Your covering letter needs to address this issue up-front. Why you have chosen not to do an MBA or why you feel you are MBA calibre even though you don't have the qualification. Be clear, up-front and honest. Recruiters want great candidates: show you are one, they are very hard to find. MBAs are very easy to find.
(9) To a better curry: use the correct proportions of single spices rather than ready-mixed kits. Make it at least 24h in advance and allow the flavours to steep. Serve the curry warm/hot rather than scalding with the best quality rice.
(10) To manage jet-lag: for shorter trips do everything you can to stay on 'home' time. For longer trips, start adjusting the hours before you go, allow a day of acclimatisation before business meetings and don't fight poor/broken sleep which is highly likely: simply have a novel to read which causes drowsiness and allows a return to sleep.
1-5 are here: To a fresh business idea/To your first novel/To a more motivated team/To healthier eating/To build your personal brand.