SQL server performance tuning - Avoid In statement

I fixed a slow nested query by replacing an IN statement with a join with a temp table. I believe this trick really works when the inner query is

Before:
Select * From Table1
Where FKID IN (Select ID From Table2 Where...)

After:
Declare @Temp TABLE(ID int)
Insert Into @Temp
Select ID From Table2 Where...

Select *

From Table1 Inner Join @Temp tmp

On Table1.FKID = tmp.ID