I think that's a good time to do one or two story quests if you haven't started yet. You get a major bump in XP for each of those, + some decent gera. They are somewhat preposterously difficult for certain levels, as they scale too far in level, imo. Granted--your story keeps you in each zone for roughly 4 or 5 quests, so it makes sense, but....I found them to be easy enough for an asuran engineer in the starting zone.
one thing you didn't mention--are you participating int he events? That's where you should be focusing the bulk of your time if you want to level. Honestly, just ignore doing the hearts directly--nearly all of them will have a spawning event nearby (you will get the notice if you are close enough, and a big orange circle on your map) that upon completion, will generally fulfill that Heart NPC request. you get the same credit, of course, but you are getting more xp and loot from mobs, plus the reward for completing events. There are also daily completions--events, gathering, killing monster types, so be sure to focus on variety?
are you gathering resources? This gives you a near-unbalanced amount of xp, and it is actually constant throughout. It doesn't matter if you can't craft those mats--they get their own storage panel, shared across account, and can always be sold on the market if you never want them.
Also; crafting. crafting crafting. Use the discovery panel.
Heh, I could say: what? you should be level 10 in ~1 hour! But I know that's silly--it probably took me a day of playing to get my first toon to level 8 or so. After you get the hang of how things flow in this game, it will seem far more straightforward. You can easily level an alt to 10 in under an hour once you understand the system.
leveling from 1-10 is, I think has been mentioned, 30% faster than 11-80. But at 11-80, the leveling remains flat. You are not scaled down in progress the closer you get--the way many MMO feel like a drudging grind for those final 5 or 10 levels. So it can be done quite quickly in this game--preposterously fast, actually--but bear in mind that those handful of people that got to 80 in only 3 days, or even those in their 60s now, have played this game extensively in betas across many classes and zones, and know exactly what they are doing.