If youre in your 50s and 60s what would you tell your 40 year old self?

[Baconontomato]

Just that really. I'm lacking direction and oomph and wondered will the wisdom of years help! What should I know about my 40s? I'm a SAHM with young children and a v stale marriage.
Does life get better?

thank you

I am 51 took me years to realise that if you do things for the right reasons and with the best of intentions you generally get the right outcome be honest with yourself and others.