One of the first 3 skills given to you in the beginning.

It's important to unlock both levels as soon as you get the computer so you can have 10% off all shop purchases to reduce the amount of grinding.

You unlock both levels by doing the lecture puzzles.

One of the first 3 skills given to you in the beginning.

It's important to several characters story progression such as: Dana, Amber, Helen

The easiest way to level Lockpicking is in the beginning of the game. When you get the quest to find the knife to unlock Dana's Room, ignore the quest and instead go to Amber's Room and it'll let you unlock her room. Do it repeatedly and do the lecture puzzles. You can get to level 4 in just one night.

Alternatively, you can just unlock Dana and Amber's door every night before bed to level it.

You can also purchase the paperclip at the market which makes picking locks easier.

Unlocked by stealing Dana's money from her diary.

It's currently exclusive to Dana and allows you to build a table and grill in your yard. Hosting a BBQ party at home raises the libido of any character at your home making quests in your home easier to complete (Amber, Chloe, Dana). Upgrading the table and grill increases the amount of libido a BBQ and Wine gives Amber and Saphire.

You level up the repairing skill by building things in your yard. The last skill level is achieved by working at Matilda's prison.

Note: Building something in the yard makes time skip. Only build at midnight when everyone is asleep.