The good news is that it is never too late to get a handle on your yard. Using scissors to deadhead the plants that blossomed while we were away, a two pronged weed puller (especially useful for large dandelions) and a narrow spade, after a few short (ok, a few more than a few) hours, the yard looks even better than before we left (or maybe it looks that way because it's neat and organized, like cleaning out a clothes closet). After the next rain and bit of beautiful weather, it will probably be a mess again (like your closet before laundry day) but it's the natural cycle, so go with it and don't get discouraged.
Another good summer activity (besides dead heading and weeding, see, gardening can be fun!) is to take stock of your plants, what works and what doesn't. For instance, I realize that in my haste to put in plants the last two years I didn't exactly plan their placement as well as I should have. I currently have an incredibly tall grass plant (a stray my sister dropped off) far too close to a couple of peonies (it casts a shadow over both) plus two daylilies that are side by side (same color) that should be moved to either side of a complimentary red wine weigelia. There are other adjustments that need to be made and hopefully I will remember to do them all.