Having your island buffs in sync is very important – useful timing page
Steaks are the best x2 buff for buildings. Knowing if you can make enough can be difficult to workout. However, if you use this formula you can work it out –
Non prem buffs
number of buildings to buff*500/6=spare meat prod per 12hrs
Prem buffs
number of buildings to buff*500/6.60=spare meat prod per 12hrs
You may not be able to make steaks but you can ask a guild member in chat to trade you steaks for meat or to make steaks. Personally I have extra steaks so I use steak to buff mines. There is some waste but who cares and I can then use the extra bread to make settlers.