I am by no means an expert, but I've found both of these useful. Much of Hartshorne is EGA-light (and by light I mean extra light): for example, there are exercises in Hartshorne that are sections in EGA (e.g. affine morphisms (exercise II.5.17 of Hartshorne is EGAII section 1)). EGA can be a hard read, but it is also more complete than Hartshorne.

As for SGA, perhaps there are other places to get this information (I'm no expert), but I've certainly used it for material on reductive groups over arbitrary bases (SGA3 III), etale pi_1 (SGA1), and etale cohomology (SGA4.5).