I’ve made goals to help with that and partially gamify completion. Helped me get to where it’s more reflex to pick up a game and play it through completion rather than dick around in service games or bounce midway through a bunch of different titles

I started by just putting a complete x games this year goal, but found that it punished me too much from playing longer games. Instead, I gave myself a point total that I’d aim for for the year and then assigned games points.

A good goal I’ve found is about 30-35 points, as it is reachable without having to super grind at games or sacrificing other hobbies. This is supposed to be fun rather than a chore. Games have points based on the following:

Game base point value: Howlongtobeat average playtime /10 rounded up to the nearest .5. This since people tend to report on the low end on that website. Also, games with a lot of side content shouldn’t be penalized, so sometimes real play time / 10 works as well. For example, Skyrim’s completion would technically be after finishing the main quest but that isn’t at all what Skyrim is about.

100%ing/Platinuming the game gets x2 points

Substantial DLC for the game are considered separate games for the point of the list.

A game that I had beaten in the past only offers half base points, however getting 100%/platinum on a game that I previously hadn’t counts as a full game completion.

The game’s full points are only earned on game completion.