gistfile1.txt

//NewProj2 isn't a meaningful Apex name.  NewProjectTrigger?
trigger NewProj2 on Opportunity (before update) {
for (Opportunity o : Trigger.new)
{
	if(o.StageName == 'Closed Won')
	{
		try
		{
				SFL5_Projects__c[] proj = [Select Name From SFL5_Projects__c
						WHERE Opportunity__c = :o.Id];
				Integer i = 0;
				for(SFL5_Projects__c p1:proj)
				{
					i++;
				}
				if(i == 0) //instead of all of this, you could just do proj[0]
				//but why only operate on this one?  Why not all the projects?
				{
					SFL5_Projects__c p2 = new SFL5_Projects__c(Client__c = o.AccountId, Opportunity__c = o.Id, Name = o.Name);
					Insert p2;
				}
		}
		catch(Exception e){}	
	}
}
}