Is there a way or technique to remember the rules easier?
Here's some knowledge that'll bust your brain open, leaving it susceptible to infection of the German language. Since my grade school days, I've used an easy to remember acronym for all of the definite articles. See if you get what I mean when I say : RESE NESE MRMN SRSR (ressie, nessie, mer-man, sir-sir) It's the last letter to the Nominative, Accusative, Dative and Genitive case definite articles!
Just knowing the articles will help you memorize the indefinite articles and adjective endings. There is a lot more to German than that, but it's a good start!
On verb conjugation
Sie and Wir (we, they, and you formal) always have the infinitive form of the verb. Well actually, there is probably some bizarre exception to that rule, because it's a language, and there's always an exception. But for all intents and purposes, it's true.
Ich always takes the verb minus the -n at the end. Your verb when conjugating for Ich will always end in an -e.
Du usually takes the verb with -st in the place of -en. Du is trickier, because it requires a lot of verbs to change more than the last two letters. At first, you'll just have to remember the verbs until you get a feel for what the conjugations usually sound like, and it will become second nature after a while to conjugate new verbs to Du.
er, sie, and es all conjugate the same, which is to do away with the -en and replace it with -t. This one is pretty straightforward, although it does make it confusing sometimes when working in the simple past-tense.
Hope this helps! Once you know the rules, there's not much else to remember conjugations, although my German teacher in high school had us do this silly tango in class that had words for memorizing the conjugations of haben.
There's more to it than just how the pronouns and endings change. You need to consider the IRREGULAR verbs. Your dictionary should have a table of these (if it doesn't, get another dictionary). That shows you the 3rd person singular of the Present, the Imperfect, and the Imp. Subjunctive, the Imperative and, most importantly, the Past Participle. Note; English also has irregular verbs with all these same forms.