Tubes

Is it just me who saves part used sealants and glues?
Is it just me that usually ends up at the local shop because I haven't got the right type or colour for the task at hand?
Is it just me who has to throw away the only suitable tube because its gone hard, only to go to the local shop anyway?
Is it just me asking themselves if its worth saving that new sealant even though I've only used the smallest amount possible?