Digging in the garden will always be a lifesaver for me. I dig in the soil and cut down invasives.
While away from the computer, there are three tools I rely on most: a shovel, pruners, and Gel Roundup.
A shovel for removing plants and locating them in a proper place.
Pruners and Gel Roundup for whacking common (Rhamnus cathartica) buckthorn and cup plants (Silphium perfoliatum). I used to get Gel Roundup through Ace Hardware Stores, but recently I have found it at Amazon and Pick ‘n Save. I have used it for four years now, and the cup plants and buckthorn have not come back.
In my yard, cup plants and buckthorn are no longer a problem with my Gel.