I used to do it alot in Japanese

Japanese Grammar Plug and Play
JPPGG #87

Japanese Language Learning
Methods For the Acquisition and Mastery of the Japanese Language.
By Makurasuki Sensei,
Brett McCluskey
Towards better Japanese: Japanese Grammar Practice

To say in Japanese that you used to ~ verb, (at fairly regular intervals and at some point in the past) use the following construction:
used to ~ (~ is any verb)
Yoku verb(base TA)+ mono desu.

The following examples will help you grasp today's JPPGG construction. After you get a feel for how this grammar is made, continue plugging new verbs into the verb area in Base TA and then continue playing by making your own unique and interesting sentences. Don't forget to practice by saying all your newly created sentences out-loud.

Drill and kill equals plugging and playing your way to building a solid base from which to improve your Japanese conversation skills will surely improve. Each new grammar principle you learn is like adding another weapon to your formidable Japanese language arsenal, which you will be able to use whenever the need arises.

Keep plugging and playing until your friends tell you they can't stand how much you practice your Japanese or until they say stop. But even if you start bugging people because you practice too much, just keep telling yourself its all for my own good. Just keep practicing the grammar constructions and saying to yourself new sentences of your own creation.

If you want to improve your Japanese, don’t fret too much on annoying the slackers that don’t want to master another language as badly as you do. The following are example sentences to show you how the construction is typically used so you too can take it and make it your own. Once again the construction for #87 Japanese Grammar Plug and Play is as follows:

English - Used to ~ (where "~" is any verb)
Japanese - Yoku verb(base TA)+ mono desu.

1. When I was younger, I used to go to school by bicycle.
Watakushi ga motto wakai koro, jitensha de yoku gakkou ni itta mono desu.
私がもっと若い頃自転車でよく学校に行ったものです {As for I, in the more young time, by bike often school went thing is.}[1]

a. The main verb in 1. is iku 行 - v. to go.
b. Putting the verb into its past tense -TA form ending gives you itta.
c. Insert iku 行, verb(base TA) or in this case itta 行った into the construction and
d. You have your new sentence.

Yoku itta mono da よく行ったものだ or I used to go.

2. He used to cheat, but the teacher busted him, and now he is a good boy.
Kare wa mae yoku kanningu[2] shita mono desu keredomo sensei ni barete shimatte ima orikosan desu. かれは前よくカンニング したものですけれども 先生にばれてしまって今おりこさんです

3. I used to play there a lot.
Watakushi wa soko de yoku asonda mono da.[3] 私はそこでよく遊んだものだ

G.A.B. or the Ghetto After Blast - One point advice -
The Japanese verb nareru means, "To get used to" which is similar to the used to that you have been getting used to in this bunpo (文法). Nareru (慣れ)るis a really cool Japanese verb, and you will hear it a lot in typical Japanese conversations.

Ex.1 He is used to that job.
Kare wa sono shigoto ni narete imasu.[4] 彼はその仕事に慣れています

As Always,
Do your Best!
Ganbatte Ne!
Makurasuki Sensei.

[1] Given here in its' literal translation; its easy to see why not to translate literally as can be seen from the corruption madness of its form and sound.
[2] From the English adjective cunning.
[3] Non-polite plain form of the copula desu = da.
[4] See JPPGG Japanese Grammar Plug and Play #88: 'Verbing' - verb (base TE) + iru or the Japanese Gerund.