Stuff that I learned from fitness and that can apply to everything else :)

1. It is never over

• Embrace permanent effort
• Only do stuff you feel you could eventually be doing forever
• Which does not mean you can never change

2. Ditch the goals

• Intrinsic motivation is king
• Short-term goals are unsustainable
• Result orientation is counterproductive, weight loss/gain is a bad goal.

3. No challenge = no progress

• Complaining and self-pity are counterproductive
• If you are cheating, you are cheating on yourself
• You are capable of more than you think
• And sometimes of less than you think

4. Good form always pays off in the long run 

• Never sacrifice form for the sake of numbers (weight, speed, reps etc)

5. No one really knows anything for sure 

• Every argument has a counterargument. 
• All theories are plausible bullshit. Try them out and believe in whatever works for you. 
• But accept that some day you might discover that all that you have believed in is wrong :)