As I can't think of any more things, I will try to briefly summarise each day's thought since the time I started this exercise:
2 days to 40 - How much of my identity is my nationality?
3 days to 40 - Is the future going to be good for planet earth?
4 - Maybe I'm old enough to revisit my spiritual side
5 - My life revolves around (and because of) my wonderful wife
6 - How happy are other people's lives (really?) and what could be so wrong about celebrating it?
7 - Age is not just a number, it is a milestone/reference point to assess life
8 - I need to work harder to find my tribe
9 - I want to see more of the world
10 - Doing things myself - pride or waste of time?
11 - I need to accept that I will look older, but not use that as an excuse to let myself completely go
12 - I don't need a pet in my life
13 - Teenage love is so different from adult/married love
14 - I seem to be falling into the generation gap sooner than expected
15 - The realisation that life is short should drive me to do more
16 - My loved ones are getting older too
17 - I couldn't achieve my dream of early retirement
18 - It is important to enjoy the money that I've earned
19 - Money is important
20 - Is age impacting how I experience food?
21 - Early success/failure is not an indicator of future wellbeing
22 - How did I get so attached to my smartphone?
23 - Maybe I should ask less questions and do more (because people expect that of older people)?
24 - Is my music my only potential legacy?
25 - I am afraid of losing memories
26 - Not all relationships are forever
27 - Life is very uncertain; death can strike anyone at any time
28 - I should not be stuck in a time warp
29 - We surround ourselves with our own truths, and it is only going to get harder to know what the real truth is
30 - It is becoming harder to deal with friends' contrary/controversial viewpoints especially when I don't see it backed by evidence I trust
31 - Will I be able to rescue myself from living just a mundane life?
32 - I cannot take my body for granted
33 - I don't smoke or drink, but still have other vices
34 - I really don't have intuition/gut feeling
35 - Grown ups don't actually have all the answers
36 - My attention span has shortened, and I don't like it
37 - Life is going by faster than I think it is - I must do more with it
38 - I am struggling to get internal or external validation
39 - Maybe it is okay to just meet the brief and not fuss over doing a brilliant job for every single thing