When I bought my house in 2014 I saw how my yard had potential but it was also neglected for many years. The previous that lived here since the 60's actually had their daughter go missing (fairly well-known case around here) and from what I hear they weren't super motivated to maintain things outside.
Since moving in I've raked the yard out every spring, cut back trees overhanging the yard, lesco, core aerated, and overseeded every year. So things are getting much better. No more crabgrass and the grass is thick enough to give my commercial mower some challenges in spots. This year it's a war on clover and this other weed that has really broad leaves and deep roots, the name escapes me right now. Once I get things where I like them I'll do my spring cleanups with the backpack. Right now raking helps dethatch more aggressively.