Depends on the day & my hunger for God. Like for example yesterday I spent about 5+ hrs. That included prayer, reading The Word, studying the Word & even on the net listening to a Piper sermon. If I could spend at LEAST 4 hrs a day I'd be a VERY happy man.
Devotionally I read through the book of Psalms once a month. I read 5 Psalms a day. for example on the 10th (today) I read Psalm 10, Psalm 40, Psalm 70, Psalm 100, & Psalm 130. Now for Psalm 119 I break that up. Sunday I read "chapter" 1-4 then every other day of the week I read 3 "chapters" per day. I go through that one every week as it's probably my favorite Psalm though Psalm 37 is up there.
I heard MacArthur talk about one of his mentors & he said he read the bible 1 hr each day & in doing that read through the whole bible 4 times a year. I wish I could do THAT.