Actually, we don't get to know. The CIA Inspector General, in his May 2004 assessment of the CIA's secret detention program, made 10 recommendations. But every one of them is blacked out in the version of the report released Monday by the Obama administration.
The recommendations begin on Page 106 of the report and run through Page 109. But with the exception of the numerals every line is blacked out (somehow the person doing the blacking out missed a "g" at the end of a line on Page 107, but without more context, it's hard to know what word that might have been part of).
So here's what we get to know about the recommendations: No. 1 was the longest, filling all of Page 106 and a third of Page 107. No. 3 was the next longest, spilling over onto page 108. No. 5 was the shortest, edging out No. 4 by one line.