1. Install 3 bar
2. Upload tune
3. Immediately apply daily beating
4. wipe drool and smile from face
In all seriousness though, don't be concerned if weird things happen during the flash. On my car you will hear blend doors open and close, interior lights go out, and the wipers activate. Afterwards I see the sync maintenance screen and have to reset my sound settings. Everything else holds.
The car will most likely shift very hard. This is normal. If adaptive learning hasn't softened it to an acceptable level in 2-3 days let Torrie know it's too hard and he will adjust.
I highly recommend taking advantage of the data log-retune process.