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MMO Champ Resto Druid Guide
The first major break-point we will want to try to reach if it is not too much trouble is 3043, for your first Rejuv and Tranquility tick.
One thing to note about the Tranquility break-point is that it only affects the HoT portion of Tranquility and you do not gain extra ticks of Tranquility itself.
A lot of people agree the second major break-point (6652) isn't worth losing Mastery/Crit over. If you have a ton of pieces with pure Haste on them, and you aren't actually losing a ton of other stats that's the main point you want to consider the second break-point. Other than that, it's probably best to stay at the 1st.
The third major break-point, and the only one after 6652 you'll want to consider, is the 13,163 break-point. It may seem out there, but it starts becoming possible around ilvl 540+. Whether or not this break-point is worth it in current gear is a topic of much debate, but the general consensus seems to be that if you can do it without losing too much Spirit or Mastery, then it's worth it. Hamlet talks about this more in-depth here. It's important to note all the possible benefits of such a Haste level, and not just the ticks you gain. You also gain a faster GCD, a better proc rate on anything RPPM (Meta, trinkets, etc), and a faster casting time on everything. If you are debating this break-point, make a post in the forums, or comment here, and the community will help you decide if your current gear would be a good fit for the break-point. Expect this break-point to become standard in 5.4.