How to improve at blitz?

So i'm ok at standard 15/10 time controls, but at blitz i just suck terribly..... 

Now heres teh dilemma..... I practice blitz more to try to get better at blitz..... don't see any progress... ive been the same blitz rating for a month (actually i was higher a month ago   )...... either I lose on time in a better position, or blunder terribly.

Should I just give up on blitz for a while and stick to 15/10?

I read that the only way to get better at blitz is to play longer games but then when i come back to blitz im not used to having that little time and get into time trouble

Also I know that blitz games are generally frowned upon but what about 15/10? can they help your OTB chess?

Considering the time controls of tournaments are keep going down----- G/30 seems to be gaining popularity.... 15/10 should be somewhat similar to G/30, no?   ausually all my 15/10 games last around an hour

but can playing JUST 15/10 help my 5/0, 5/2?

im thinking my routine now should be 

play 2    15/10 games a day, analyze them, etc (about 2 hours)

play 2  blitz games a day, analyze them etc (1 hour)

Tactic trainers/chess tempo (30 min)

Chess book study/going over GM games (1 hour)

instead of what i've been doing recently for the past month which is more like

a bunch of 5/2 games, analyze them,

Why would you waste your time with blitz?

You can try some opening systems like the KIA,and try to play fast but correctly...so it is not a big deal if you spend for example 5 more secs for a move...and also practise at 3/0 games which are fast but not too fast so you can still have a chance for a win or draw on time if u blunder at some point of the game