Sandboxing and work arounds

I often have websites that are brand new and they come to me looking for immediate results.  One of the frustrating things I deal with is Google sandboxing.  More so in the last six months or so, but it has always been an issue over the last couple years.  The only sure fire way I have found to get around a sandbox is to use an old over a year domain and do a 301 redirect to the new site.  When my client has an older website that works fast and does the job of also passing that juice.  I am curious if any other SEO experts in here have found any other things they can do that speeds up getting out of the sandbox?

There is no work around for google sandbox.

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