Declaring variables

I'm having trouble with my declarations I think.
I can never decide if it should be a Long or Range or Cell etc etc.

I am struggling to get the attached code working as I keep getting "application defined or object defined error", which I presume means I got it wrong again regarding my declarations.  

As always any pointers are greatly appreciated, and maybe someone could point me in the right direction of any articles helping me understand Excel VBA declarations.

Thanks

Dim x As Range
Dim ws As Worksheet
Dim lr As Long
Set ws = ThisWorkbook.Sheets("Data")

lr = ws.Range("T1048576").End(xlUp).Row
    For Each x In ws.Range("T3:T" & lr).Cells
        If x.Value <> 0 Then
            ws.Range("AL1048576").End(xlUp).Offset(1).vlaue = x.Offset(1).Value
        End If
    Next x

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I have tried a number of variations of the Range,Cell,Long etc etc to no avail.