A good reusable checklist system can help with this. I've been using an app called SplashShopper since the Palm Pilot days that lets me choose what I need for

A good reusable checklist system can help with this. I've been using an app called SplashShopper since the Palm Pilot days that lets me choose what I need for any particular trip from a list of common items. This lets the list adapt to the particular needs of each trip. It's the only app I've ever found that hits this sweet spot of reusability. Unfortunately the company that makes it does a poor job of updating it for iOS, so I keep an ancient iPad around just so I can keep using it.