God's answer for Gideon is to focus on him. God said he would be with him. However, what I find important is that Gideon knew what God had done in the past with his ancestors. This gave Gideon something to build on and at the same time gave God something to work with.
This spiritual principle applies to us today because as we recall what God has done for us in the past, this allows the Holy Spirit to use that to strenghten us when we have forgotten and have lost our faith in God and our selves or just plainly lost our way.