Learn the nouns ending with ь with этот или эта. For example do not learn just день learn it as этот день or эта ночь. Otherwhise as you dig into the russian grammar more you will have problems with those nouns ending with ь.

And for the verbs learn them in pairs and learn their declensions as well.

Try to remember the conjunctions with the cases that they are used with.

Etc...

And try to repeat alot. Review the vocabulary you are trying to learn in a regular basis. Read as much as you can, listen and try to write as well. Infact if you can find a Russian friend to make conservations with I think that will be the best.

It will not be easy but at the end I believe it will worth it.

Good luck at your studies.