I have close to 800k in TP bonus from furniture that never gets consumed as I fight mobs and complete quests. Please let me know if there is a setting I need to change, because it seems i am the only one having this issue.
XP and TP bonuses will draw down, if you're killing enough mobs close to, at, or above your level. You won't get them for turning in quests. Even then, depending on how quickly your gaggle of furniture renews your bonuses, you may never notice. I have a Dwarf with one 35XP and one 30TP furniture piece each, and he goes through all of it, even at 32/32/30. On the other hand, I have a 70/67/56 toon with tons of bonuses that never go away entirely. Rather, they did once get used up on the 67 side, but they're rebuilding nicely.
Oh, and remember that the furniture bonus gathers only on your currently active primary class. If you'd rather build up the bonuses on your other class(es), swap over to one of them before logging out. The higher the level of the primary class, the greater the XP/TP bonus that builds up. YMMVPL.