Good on you for saving water. A few tips, when bucketing washing machine water, on the lawn is fine but don't use it on edible plants - it will have a low level of potentially dangerous bugs, so feeding your food with it is not advisable. Secondly, don't keep pouring your bucket in the same spot, water a different area each day to ensure the extra nutrients and other chemicals don't overload the soil in one spot. Finally, next time you buy washing powder, try to find one that is grey water friendly (that's the terminology used here in Aus, may be different over there) which may need to be a "green" brand.
Secondly, nothing has helped reduce our water use like installing low water fittings. They are set and forget - once installed you never have to think about them again. We have a 9Lps showerhead - old fashioned ones could be around the 20 Lps mark. It cost about $20 from the hardware store with no shopping around, and took about 5 minutes to fit with no plumbing experience at all. Similar options exist for taps but I tend to think they are less useful taps are generally used to fill a container rather than for a fixed time. Beyond that, the best improvements involve replacement of appliances. We have a fantastic system here where all appliances are required by law to have a big sticker showing a star rating and actual consumption (for both water and electricity if relevant) and when we have to replace them I always put ongoing consumption high on the list of features to consider. Dual flush toilets are brilliant, but I understand far less common in the US than in Aus - here I don't know if you can even buy a single flush loo any more. If you don't have one - try putting a house brick in the cistern - it fills up some of the space and thus reduces water use. Most toilets use way more water than they need to.