I've built up a pretty high tolerance, and I've been thinking about stopping for some time as well. It just doesn't do what it used to, I feel like whenever I smoke, I'm wasting weed. Breaks usually help out of a lot of things.
Wake and bake. I smoke a bowl at sunrise and have more every few hours throughout the day until bedtime. I don't have any trouble getting stuff done. I was out this morning in the hot sun cutting down an old papaya tree and carrying off the debris to the vacant land in back. If your weed is slowing you down maybe you should try and get some Sativa.
I prefer a bowl .25 inch deep and .50 inch diameter. It holds about a 12th gram to a 10th gram of fine fluffy herb.
*sigh* I have a habituation with a tolerance problem. Sucks. 6 days is the longest I have been able to quit since I got into smoking daily 6 months ago...