Goal: Learn a few Kanji for vacation to Hong Kong and Japan. Stretch goal: Learn JLPT N5 (About 100 Kanji)

Anki (A SRS (spaced repetition system). Getting started with Anki)

• Hiragana
• Katakana
• Japanese N5 Kanji (Or Japanese::Vocabulary::Kanjis N5)

Joe Strout's learn Kanji by radical first. Joe used Wani Kani which requires pay at level 4, but there's also Kanji Garden.

Joe recommends learning these 63 Core Kanji first: 人 口 丁 可 何 一 儿 目 見 大 刀 月 前 出 手 了 子 日 メ 気 今 土 王 主 生 三 言 力 中 木 本 田 俺 行 ト 上 八 分 入 門 間 立 音 先 ヰ 年 米 来 ム 禾 私 心 思 女 男 下 十 早 夕 名 小 尹 君

Here's a An online JLPT 5 PDF book with handy mnemonics.

I like these two iPhone apps:

• Kana
• Benkyo

• Handy overview: r/LearnJapanese Starter's Guide
• I searched Anki JLPT N5 decks, and the above were my favorite.
• White Rabbit flash cards were handy, but no longer available. I'll try Japanese Kanji 1-200: JLPT Beginning Level by by Alexander Kask and Emiko Konomi Ph.D.