I sometimes forget that new posters come and go, and may not know all of what is out there.
Here is a great resource for figuring out what picks the C's actually have in the future, and how likely they are to get them.
http://www1.realgm.com/nba/draft/future_drafts/detailedFor example, there's the "oh, if the Nets stink and win the lotto, we get the #1 pick!" This one has been mostly contained as it's just not true, since Atlanta has the right to swap with the Nets BEFORE we get the pick.
But some others pop up, like the future 2nd rounders from Sacramento. "Wow, those are like extra late-firsts, great for luring Euros!" No, they are top 55 protected, so will never change hands.
The above link provides the details for all teams. Here is the Celtics' current situation:
Credits (owed to the C's):
2014 first round draft pick from Brooklyn
Brooklyn will convey the less favorable of its 2014 1st round pick and Atlanta's 2014 1st round pick to Boston (via Atlanta's right to swap for Brooklyn) [Atlanta-Brooklyn, 7/11/2012 and then Boston-Brooklyn, 7/12/2013]
2015 first round draft pick from L.A. Clippers
L.A. Clippers' 2015 1st round pick to Boston [Boston-L.A. Clippers, 6/25/2013]
2015 second round draft pick from Sacramento
Sacramento's 2015 2nd round pick to Boston protected for selections 31-55 (if this pick falls within its protected range and is therefore not conveyed, then Sacramento's obligation to Boston will be extinguished) [Boston-Sacramento, 2/17/2009]
2016 first round draft pick from Brooklyn
Brooklyn's 2016 1st round pick to Boston [Boston-Brooklyn, 7/12/2013]
2017 first round draft pick from Brooklyn
Boston has the right to swap its 2017 1st round pick for Brooklyn's 2017 1st round pick; if Boston exercises this swap right, then Boston will convey its 2017 2nd round pick to Brooklyn protected for selections 31-45 (if this pick falls within its protected range and is therefore not conveyed, then Boston's obligation to Brooklyn will be extinguished) [Boston-Brooklyn, 7/12/2013]
2017 second round draft pick from Sacramento
Sacramento's 2017 2nd round pick to Boston protected for selections 31-55 (if this pick falls within its protected range and is therefore not conveyed, then Sacramento's obligation to Boston will be extinguished) [Boston-Sacramento, 2/24/2011]
2018 first round draft pick from Brooklyn
Brooklyn's 2018 1st round pick to Boston [Boston-Brooklyn, 7/12/2013]
Debts (C's owe elsewhere)
2014 second round draft pick to Dallas
Boston's 2014 2nd round pick to Dallas [Boston-Dallas, 6/27/2013]
2017 second round draft pick to Brooklyn
If Boston exercises its right to swap its 2017 1st round pick for Brooklyn's 2017 1st round pick, then Boston will convey its 2017 2nd round pick to Brooklyn protected for selections 31-45 (if this pick falls within its protected range and is therefore not conveyed, then Boston's obligation to Brooklyn will be extinguished) [Boston-Brooklyn, 7/12/2013]; this potential pick conveyance is the same as the one described in "2017 first round draft pick from Brooklyn" on Boston Credits