I'm sort of the opposite of you, since I came from the classical side and have more recently gotten into the jazz side. Well for one thing you should always practice scales/ arpeggios as part of your routine, and doing these with the bow, since the majority of classical music is arco. Also, you can incorporate just some bowing exercises, such as pulling whole notes on your open strings, to practice your string crossings--making them as smooth as possible and with as little movement from one string to the next as possible. Also you can practice in front of a mirror to watch your bow's tracking across the strings-- try to make it level, and at least halfway between the end of the fingerboard and the bridge. One of my teachers emphasized always trying to keep the bow closer to the bridge, while my teacher before him said that you could play with the bow closer to the fingerboard when you're striving to get a softer sound. You can play with both of these ideas, but on the whole, closer to the bridge as opposed to farther away is probably more ideal. And of course if you're playing harmonics you'll need to be super close to the bridge.
Another thing you can focus on is shifting and pivoting with the left hand. For example, if a piece calls for an A in first position on the G string, and the next note is say an A in third position, take a few moments to isolate this shift and just practice shifting from the low to the high note, or whatever the case may be. You can even practice it pizz first, just to focus more on the left hand, and then add the bow.
Another thing you can work on as well is different bow attacks, such as detache, legato, spicatto etc... And you can do this while playing scales or just open strings. Legato is a smooth, connected sound from note to note with the weight of the bow arm in the string. Detache is "detached", meaning you keep the weight of the bow in the string but with a break between each note. Spicatto is the bouncing bow technique, short notes where the bow actually "bounces" up and down to create the sound.
Anyway, I hope this helps you. Good luck!
