Hey Olendirk
I've been flying commercially for almost 25 years and i still ocasionally forget little things...that's why we have checklists and safety pilots..that's the OTHER crewmember,whether a CPT or F/O, and i guess everybody out there could tell you the same..so don't worry..you're not the first nor would you be the last that feels that way.
you NEVER EVER stop learning...i tell you i never have...and i've been a pilot for 25 years
The minute you think that you have nothing more to learn is the time you need to stop flying because you became dangerous to yourself and to the people who fly with you..and you LEAD your crew and not RULE them becuse you are more experienced than the rest and more KNOWLEDGABLE than the rest(wich implies continuous learning)