Go to a place where they may have information regarding the Venice Strand and its shops. This way you can familiarize yourself with which stores are where and which places you would want to avoid, due to lack of interest. Scoping out the shopping scene beforehand may make your shopping experience more pleasant and productive. You can go to a local hotel in Venice and ask for a brochure. You are usually sure to find one there!
Circle the areas on the map and rank them in the order of where your interests lie. This way you can prioritize your time wisely and hit the shops that interests you the most rather than wasting your time wandering from store to store.
Go to the Venice Strand and go to the store that you have ranked highest on your priority list. If it is crowded, go on to the next store and come back when you see that the chaos has died down and you are ready to enter.
Make sure you have cash in your wallet, since it is possible that many of the stores on the Venice Strand operate by cash only.
Negotiate if you see something that you really like, yet cannot afford. If it's a street vendor, they'll likely reduce the price a bit. Keep in mind these people work very hard for a living, staying out in the hot sun for hours at a time. Don't try to cheat them of deserved money, but negotiate when absolutely necessary.