That’s nice of you to want to work on this! Do you have an iphone by any chance? I think the easiest option is to set a reminder either by time (e.g. if you know you’re going to the store at 2pm, set a reminder at that time to pick her up something nice) or location (e.g. same thing, but it’ll remind you to pick her up something when you arrive at that location).

For small activities, I’m not sure if there’s an app for suggestions but you could always check google for ideas. Figure out a time when you’re both free and plan quick coffee dates, go for walks together, go to local parks or trails, check out a new restaurant, etc. You could block off a time each week in your calender and set a reminder for whatever outings you plan. Hope that helps a bit.